They´re probably still there and not showing up for some reason related to the new system. The number of reviews listed for me suggests that nothing has been removed at least.

There is more coming. There is some leaked images in the Anniversary thread. They haven't even updated the main page yet.

EDIT:

The only thing I dislike is the auto-playing videos. Hope they change that or add an option to disable it.

The page redesign is vaguely similar to Windows (Microsoft) Store.

But it's nice to see that the gog team is trying to improve the user experience.

On a positive note, the filters for the reviews are a big improvement. It is much easier to search through the reviews now for relevant info.

Aaaand another dislike for video autoplay.

Love it. Would like to see the price on the matrix too. But other than that, excellent job, GOG.

Oh, and I'll add my voice to the no-autoplay-please.

Ah, I'll go and poke around in there. Thanks. All I really want is a search that lets me look for "discounted games currently under £X" rather than the horrible clunky options we get now. Give me that and I'll be happy.

Can I please disable the autoplaying videos? I'm on limited bandwidth.

Some feedback:

The autoplay, as has been mentioned, might not be a good idea. Limited data and all that. It's generally just not good practice and it looks cheap, sorry to say. There were trailers before. People could click and watch them. We're quite capable to manage that. Besides, you're running into a rather awkward situation here, being Gog: many of the older games do not have a trailer to show here, meaning their store pages are half empty on opening. To put it plainly: this doesn't work. At all.

The size. Up to this point the store pages had been more compact than Steam's, for example. While there's thankfully still a lot less clutter, the information is now a lot more stretched out. Is there a reason for this? Instead of being able to discern all relevant information at a glance, there's now a lot more scrolling involved to review relevant information. This is more work for the consumer with, at least at first glance, no added benefit. Why?
And while we're at it, what's up with recommendations? I'm having the store page for HuniePop open right now and under You may like these products you're showing me The Witcher, The Witcher 3, Sunless Sea and the HuniePop Deluxe Edition Upgrade. I'm on Linux (you know this, you're showing me Linux system requirements - good job there by the way), I already own Sunless Sea and there's no reason to show me DLC here, because the store page already has a section for DLC - where the Deluxe Edition Upgrade is indeed listed. So that entire section is completely useless and the vertical space it exclusively occupies completely wasted now, isn't it? Again, why?
And just out of curiosity, how do you get from HuniePop to Sunless Sea, exactly?

Furthermore, there's a worrying lack of Gog Mixes. In the past these were probably one of the best features here. Set you apart from the competition in a good way. I would hope they are planned to make a return in the future.

Also: Popular Achievements. This is occupying more vertical space. Why is that even there? You're listing achievements under General Features. This is enough. The knowledge that I'm getting an achievement for killing my first enemy has no bearing on whether I am going to buy Tower of Time or not. The system requirements (listed further down) or the game engine (not listed at all), however, might. Even if for some reason I actually was interested in achievements, this would be useless, since the list doesn't seem to be exhaustive. So why is this here? Of course, we all know the answer, but to be honest, if I wanted Steam, I'd use Steam. Steam is pretty good at being Steam, you know.
So I don't know if this is possible, but could we make this optional? I faintly remember Galaxy being optional and always remaining optional. The option not to have Galaxy-exclusive features shoved in my face would be pretty dope and rather consistent with that statement. I realize this isn't going to happen, because it might be difficult, you wouldn't directly benefit and to be completely honest, it's not a massive deal, merely a bit of an annoyance I could live with, if I really had to. But, you know, principles and shit.

On the positive side, at first glance the overhauled review presentation looks very nice. In terms of filter functionality as well as visually (e.g. full reviews as standard). Well done! I have no idea why the reviewers' number of games is visible to me, but since their profiles are inaccessible from there (you sly dogs, you), I can't check whether any of them are set to invisible, so for now you're getting around a stern talking to.

Another positive: the design looks very clean. It already did before and the sacrifices necessary for the look aren't worth it, but I want to point that out as a positive. It's by no means a terrible redesign, it's just not a good one.

Overall it's still better than Steam's garbled mess, so yay?

Edit: ranting about achievements.

I'm not noticing the videos auto-playing. However, I'm also using Safari 12.0 and I think that might automatically prevent auto-play videos. Though, I think the previous version did, too.

Safari also has preferences for setting whether videos should auto-play per site, if desired. So, maybe other web browsers do, too? Has anyone checked their web browser settings?

Just mentioned it because even though a web browser doesn't prevent auto-play videos by default doesn't mean there aren't settings to prevent it. Safari prevents that by default and has settings to change that, so it seems likely that at least one of those features would be in other web browsers. Or maybe an extension for browsers that don't have features? Good luck everyone on that.

It'd be nice if animated gifs were stopped, too. Seems like there was an option for that in web browsers a couple of decades ago, but there isn't for Safari. For those I just use CSS to hide all GIF images since they've usually been animated.

Wishlist enty for these improvements is here:
https://www.gog.com/wishlist/site/videos_shouldnt_autoplay_and_should_have_full_controls

Those elements look a bit too large for my 1366x768 display, it's like this interface was designed for HiDPI monitors. And it just doesn't look... as neat? as the previous version: https://imgur.com/uDYD6HB

I am okay with that large video window, but at least add playback controls and the "disable automatic playback" option, just like Steam does.

Another feature I'd like to see in the new UI is a link to a game's forum. Currently you can access it either though your library or a search field in the general forum section. Both of these ways are not convenient, so maybe adding forum links on game pages will attract players to them? The activity on most game forums leaves a lot to be desired.

Liked how they added more screen space and filters for reviews, though. And yeah, where is the GOGmix section?

Nice new interface. The only problem I see with the implemented filter for verified owners is all the bugs that GOG has with different versions. For example, I pre-ordered PF:Kingmaker, now none (!) of the editions is 'owned'. Add kickstarter keys to the pre-orders (like PoE and PoE2) and you will notice that a huge number of people "do not own" games here.

I like the new design as it looks fresh and easier to look at.