I find it interesting that the way Larian "solved" the "not fun" combat is by keeping the mechanics from dos 2
I'd find it interesting if that was their reasoning, that is, 5e combat is not fun. Because Solasta is implementing 5e combat almost to a fault, and people are praising it as the best thing in the game.
There is no point in comparing these games. Solasta doesn't even have 2k reviews on Steam where BG is over 25k. In addition, both games have a different target audience as well as different budgets. Solasta as it's a small niche game whose creators can afford to please only D&D fans, which is not possible in the case of BG.