Concerning DOA 5, first at least the paid version is only $40 for ROW. Double that price for those of us in Japan. But there is now also a "free" version that allows you to purchase the parts of the game you want. Still expensive. Still not a great model, but it's better than being asked to pay $80 for something that's been available at less than $20 on PS3 for some time. Still wouldn't touch it with a barge pole mind.
As for Atelier Firis, this is great news with just one little annoyance. No Atelier Sophie first. I really hate it when companies decide to release only the future parts of a series instead of starting with the first entry in a particular story line. So if you haven't played Sophie on PS4/Vita you're going to miss out on a chunk of the story when starting with Firis on PC.
As for the series itself, there is a big focus on alchemy. That is gathering ingredients to make new items. Sophie and Firis add a puzzle element to this by having you also piece the ingredients together on a grid. Also bear in mind that Firis only released in Japan recently, and thus as is usual for a Gust title is still riddled with bugs.
Hopefully, they finish patching them before the ROW release =)
JinKazaragi: Would be nice to see it here, my PS3 won't live forever.
Depending on how bad the port is I would wait for a good discount though.
FYI, no PS3 version was released for Firis. Only PS4 and Vita.