Solasta manages to incorporate vertical battlefields in an impactful way WITHOUT giving advantage/disadvantage based on height. Basically, the high ground makes it harder for melee to reach the archers. This is aided by the fact that they do not have ridiculous jump physics in Solasta.
There are many non-encounter things that BG3 does better than Solasta, but when dice meet table Solasta is vastly superior. None of this extra crap is needed to make smooth and interesting battles.
