Thanks for the replies.
I didn't know patches were being limited like this. I don't know if GoG have any sort of position on any of this, but if it really is a matter of clearing perceived clutter, then that seems bizarre to me. It's a list of patches. 1.01, 1.02, 1.03, 1.04... you get the idea :o) The point being, that it's just a straight forward numerically increasing list, in order of the patches release, in the Patches section of the game, so I'd be interested to know what's happening here. It seems to me that a list of the patches, for people to just choose which ones they want, is a lot better than not being able to download the patches at all. That's terrible. And based on even a small window for download of one day (Monday), I still couldn't get patches 1.14 and 1.15 . Were they ever even available?
I contacted Support over the weekend, so I'll see what they say.
I noted your edit though. So this is now the third time that a bunch of patches have been unavailable for this game.
As for cumulative patching [is it cumulative or accumulative - I have no idea :o) ], yes you may very well be right about that being on the developer. Although there seems to be a thing where GoG take the patches from the developer (or publisher as the case may be) and package them up manually for the manual download, it would probably be a different deal altogether to combine them all into one. Not sure though why it seems that Galaxy can have the patches pushed by the developer, but manual patches have to be packed individually by GoG, but maybe I have that wrong.
(Interesting to me that you mentioned Divinity OS 2, as I decided to leave purchasing that until it had been patched up.)