Just FYI:

Haste - Mostly BG3. In 5e Haste gives an extra action, the double speed, +2 AC, and is very strong. But the things you can do with the extra action are limited, including no spells if you've already cast one and only one attack even if you have multi attack from a feature. To be fair programming that special set of haste actions and limitations would be a nightmare, but BG3 takes an already strong spell and makes it much stronger.
Multi Hit Damage bonuses - Mostly 5E. In BG3 you get ability score damage bonus while in 5E you typically need a feat, fighting style or feature to get it, but *all other* damage bonuses apply, making that one carve out weird in the first place. Larian basically giving that bonus universally instead of it being a weird one off is actually an improvement, the problem exists either way and is inherent to 5E.
Feat Balance - Mostly 5E. Sharpshooter and Great Weapon Master and the rest are pretty much straight lifts vs 5E, and ones that aren't in the game can be even worse, like Elven Accuracy which grants effectively super advantage (extra D20 that stacks with advantage) but *only* if you're an elf. Tavern Brawler is strictly on Larian though, it's garbage in 5e and they made it the best feat in the game by a significant margin.
Maximizing Damage being too good - That's just like, your opinion, man. BG3 has an incredible variety of ways you can approach things, and I strongly disagree with your premise that it's objectively superior to maximize damage.
Concentration being arbitrary - Entirely 5E, as far as I can tell it's a straight lift. If it feels arbitrary, that's because it is, and that's solely on WotC not Larian.
Inactive Cast Member Buffs - Mostly BG3; they could drop concentration when removed from the party, but being able to pay for spell casting services and get pre-buffed in general is absolutely a thing in 5E
"Attack Rolls" being better than "DC" - Again I disagree entirely; many DC based effects are incomparable in how good they are vs effects reliant on attack rolls. Even if I agreed (which again, I don't), DCs vs Attack Rolls are pretty much straight lifts from 5E.
- Long Rest Required too often - 5E entirely, nothing is different there; ostensibly casters should be using cantrips the majority of encounters but there's zero reason in PnP to not just long rest after every encounter in almost all situations.
- Poor subclass balance - 5E, BG3 is actually far, far better about this than base 5E.
- Terrain is trivialized - Kinda a hilarious complaint to me; given that they're not really "obstacles" per se but moreso things to play with. Combat in BG3 often features terrain which is varied and interesting, compared to the majority of D&D 5E encounters at most tables I've seen having little to no terrain variance (and in fact in most games), because terrain is complex and hard. BG3's terrain is imho one of its best features. The ritual spells you refer to are all in 5E, but unlike in 5E, BG3 has them *actually be useful* because you have terrain to interact with in the first place.