I think a closer hewing to D&D would absolutely have been better. I was replaying solasta before BG3 came out and I enjoyed the encounters there so much more, genuinely. I was actually looking forward to fights just a little bit in that game, unlike BG3 where everything just feels cluttered and jumbled. Granted, everything else around the combats are better in BG3, but I genuinely think Solasta combat with its loyalty to 5e is my preference. And I'm not even a fan of 5e.
On a related note, I prefer items in Solasta better too. BG3 has so many items that do so many different things, it's a chore trying to parse what I should be using for which characters, made worse by the abysmal item management.
True. D&D 5e works well in Solasta. But BG3 got 97 % on metacritic so it is the best game of all time and Larian will not change anything here.