I mean if this your passion, go for it. I'll admit that my experience with RPGs is largely related to DnD games and the spiritual successors to BG2 but I've never had the experience with "shovelware" games that you've had.
But from my limited experience of unity games with POE1+2, Solasta, Disco Elysium and WotR All the titles I mentioned have better party controls than BG3. * I just hate moving toons around in BG3 and DoS2. And these aren't nitpicks, they are reason I would stay away from game. BG3 is a game with truly stellar parts and some parts are complete trash. The chain mechanism is trash.
Not nitpicking part 2. I'm focusing on how they fixed those bugs. They fixed them by altering the maps, not improving the pathing. It's like covering your tracks. I mean we don't notice because it works -- so what's the problem, right? The problem I see - for you - is that you are going to lose hours and hours to making maps that work with the chain system. And that doesn't seem like time well spent. Ohh . . . need to alter where I allow people to make a fire surface.
I would be interested to see a comparison of downloads vs completion rates on the BG2 port . . . I downloaded, played for 15 minutes and stopped.
But, again, if you thought that was a worthwhile project and the devs time was well spent then you should follow suit. Good luck to you and have fun. Sincerely

* I do acknowledge that the Disco Elysium controls are nothing great. Not as bad as BG3 but not great.