avoiding combat results in outcomes not as good/beneficial/effective as going the combat route
Interesting that you feel that's one of the "Big mistakes"
Given that BG3 is actually one of the best RPG's for making non-combat options comparable to combat ones, with nice exp gains for non-combat options and a relatively low level cap means the usual concern of it being so much better for exp gain to just murder everything is less prominent (Though, it still has that annoying thing where you can maximize exp gain by using non-combat dialogue options... Then murdering everyone anyway)
Sure, it's not perfect (It generally won't ever be so long as combat provides experience) but it good enough where it doesn't feel horrible to bypass combat.
