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.
Makes a lot of sense comparing these games because they are both party isometric RPGS based on the same system. Having 2k reviews on Steam doesn't change that. They have the same audience as well, which is fans of isometric RPGs.
And if Larian wants the game to sell more they SHOULD follow the rules closely since tabletop D&D fanbase is far bigger than DoS. Have you seem how (more) massive D&D has become in the last 5 years?
