Really good points OP.
Playing both, i also feel Solasta managed to make reactions more exciting and interesting so far (at least to me) without slowing down the combat significantly, as others said they add a whole another tactical layer which in their current form i just dont feel they do in BG3.
Though i need to say, not all reactions are added to BG3 yet and in many interviews Larian said they are still experimenting with this system so im confident the current method is not set in stone and they will tweak it according to feedback
