What really bothers me about the BG3 demo is that Larian is still using a lot of DOS features like:
1) marking red field of vision when sneaking (same as DOS - proposing to change this visual),
2) using fog clouds animations (same as DOS, please remove this visual and make it a PC/NPC status),
3) overusing surfaces interactions (water, grease, blood etd - same as DOS; please enough with DOS features),
4) to much items and overly large inventories (same as DOS - BG1and2 had relatively small inventories, I would propose to somehow simplify the item gathering process or even use a mechanic like a courier similar to what they did in Torchlight - it can pick up generic items and sell them with on or two clicks)
5) making the combat not look so similar to DOS (changing/removing the attack path line visual)
6) changing the jumping animation to something a bit more realistic (i think nobody was really impressed when Swen Vicke showcased the feather spell and jumped of the building - that spell is a rip off from Morrowind etc.)
Just my two cents, what DOS gimmicks/features from DOS would you NOT like to see in BG3?
Aside from MAYBE 6 and 4, I have no real issues. Some visual markers are like they are fora reason. Red is associated with danger. I don't see a recon to change thing just for the sake of trying to look different.
Speaking of 4, personally I hate how packrat/lootlord friendly many RPG games are. I'd rather not have you pick up, carry and sell everything that isn't nailed down. I don't mind enemies dropping everything they carry (everything you can see on them) as that makes sense, but you should pick what you need and move on, especially since there is a sense of urgency to the plot.