You can also add to this list off-screening enemies with fog rods. Since you can stack fog you can literally make an entire screen AOE. Even beholders have issues to resist it apparently. Never used it since balduran shieldd reflects beholder's rays and they just suicide on you but there's that. It's worth mentioning since it's the closest to actual exploits together with the sloppy BG2 AI + being able to disengage mid fight and basically spam all buffs in the game each fight in most areas.
When it comes to mages being 100% broken and OP they do come with game knowledge though so I would call it way more legit.
I'm really curious how BG3 will work on higher levels though. For now we are still on low levels encounters so rather than BG2 the direct comparison would be BG1 actually. And when comparing low levels adventures of BG1 to BG3 I think there's no comparison and BG3 just straight up did it 100% better. From all aspects apart from party banters. Goblins in BG3 are quite straightforward especially with the meatgrinder in the goblin's camp where they clearly just CAN'T win regardless of their numbers but that's what goblins always were in BG. Not speaking about the straight up retarded BOW meta of BG1.
Due to turn base vs RTWP it makes it a bit akward to spend so much time on trash -tier level encounters. Based on ALL of what was said above I would just say combat speed shoudld be improved in BG3 ( how exactly was alreaddy mentioned indefinite amount of times) and this will just make BG3 outclass older BG combats in all aspects.
Last comment regarding exploits: I think in BG3 they just made those exploits stand out way more since there is less of them ^^
Alt+ left click in the inventory on an item while the camp stash is opened transfers the item there. Make it a reality.