I think it's dangerous to balance around the very few that know the ins and outs of abusing a system and then say "omg, this is so easy". The vast majority of players do NOT abuse those systems, or even know how to abuse them. Wrath of the Righteous on core difficulty is a perfect example of it. Hell, even on normal, it assumes that you know a lot of the rules and are able to abuse a lot of the mechanics. I love wotr, but I don't want to see BG3 go that way.
That is one of my main criticisms of the Owlcat Pathfinder games. They require a lot of system knowledge even just on Normal and the games don’t do a very good job teaching. It's very much a game by and for Mathfinder enthusiasts, which i have to admit i am not.
What's the saying? "Pathfinder is a game of 1000 options, where 990 are worse than a +1 to attack"?
I think higher difficultues should require good game knowledge, but i'd rather have "normal" a bit on the easier side if the alternative is accounting for system abuse.
Or, you know, have a less abusable system, but this is Larian so i doubt we'll ever get that.