% hit barely exists in any modern RPG. Don't confuse it with crit %, they're not the same thing. In DoS, % hit is absolutely negligible, and a caster doesn't spend AP on a 50% chance to hit spell they can only cast 5-7 times before a long rest is needed, on top of the fact spellcasters in DoS get to weave all their spells without some contrived restriction of Concentration.
"They're doing an amazing job with RNG in dialogues". Speak for yourself, I'm not particularly interested in reload spam for important dialogue choices like saving Arabella, convincing Kagha to turn on the shadow druids, or diverting Dror Razglin's interrogation of a mindflayer. No thanks. Whether I see the druid grove frescos with the history of Ketheric's defeat or not just based on a dice roll or not. Whether I get to reveal traps via perception or not or blow myself up.
This has everything to do with dice rolls. Some of us appreciate what Larian has done in their previous 2 games, and given the success it deservedly got them, I'd rather they stick with known quantities than some tabletop gimmick that has forced them to waste time on even a feature called "weighted dice" because obviously the RNG is unpopular.
If Larian were interested only in their DOS-playerbase, they'd have simply made DOS3; nothing was stopping them. But I'd not be interested BG3 if it had DOS combat, and I'd request a refund of the EA if they now did a complete U-turn from the current combat system. And I like that not all conversation options are easy for every character build. E.g. as a druid with speak animals (or shapeshifted) you can ask the snake for help in convincing Kagha to let Arabella go, and there is no roll involved.