The extremes are why I'm trying to get more of a balanced 5e RAW difficulty setting. Doesn't have to be hardcore strict 5e, but something much closer.

But again, balanced around 5e. Don't give me 5e after you've balanced encounters around homebrew and then the only way I can play 5e is of I'm going up against ridiculously hard enemies.

I've tested the encounters in BG3 with tabletop. Almost every encounter is Deadly CR after the grove. Spiders, gnolls, Gith patrol... Especially the Underdark like the bulette and minotaurs and especially with party of 4 at level 4.

Balance encounters for 5e rules around party of 4 Custom with 2 Origin, total of 6, and use proper enemy 5e stats and you can keep all encounters as is. Even the beginning intellect devourers are doable with party of 5 (4 customs and Shadowheart) if you use proper 5e stats and make them as wounded as they are now.