1- Music - Hated D:OS music and overall sound experience. D:OS2 was way better but still a bit generic. I would like BG3 to be more epic, like the old BG.
I find DOS2's music to be superb. It's one my favorite parts of the game. I think I get what you mean by "epic," but I think those big choir and timpani scheme is a big played out now. I think Basil Poledouris set the bar with Conan the Barbarian (1982) and all others in fantasy have been trying recapture it. I congratulate Larian for not going with the flow and daring to do things differently.
2- Voice acting - Hated D:OS voice acting. Way too over the top and goofy. And all those accents, ungh. Again, D:OS2 was slightly better but not by much. I wand David Warner, Kevin Michael Richardson, Jennifer Hale kind of voice actors. Better voices AND better acted.
Didn't bother me, but didn't wow me either I guess (I'm not sure I care enough either way). Just no more tired-old-man-wizard crap like whats-his-name is Diablo.
4- Equipement management - This is the single thing I hated the most in the D:OS games. I feel like I lost like 30hours managing inventory and upgrading my equipement out of 100hours of gameplay. It was REALLY annoying.
The mod/goody bag helped with this I think. Upgrading equipment? See point 8
5- Less mundane items - This is a bit of a personnal taste of mine, but I'm really not a crafter in videogames and I just found that more often than not, my inventory was flooded with useless (to me) items, plants, rocks, bowls, books, utensils, jars, etc. Tone it down a bit please, or, better yet, remove it all for all I care.
Don't pick up everything.
6- More differences between character classes - Just throwing it in there, but I suspect 5E rules will take care of that. In D:OS, no matter the class, characters could be built to be exactly the same to one another. I missed the flavor each different classes brought to the table in D&D. I have good hopes it will be back.
Even though their aren't classes and we're free to mix and match whatever, there does seem to be a bit too much similarity often enough. So, I pretty much agree here.
8- Random loot - Please, stop the Diablo like looting and equipment. ''Magical astonishing great hammer of whatever-I-don't-care...''. Enough. UNIQUE items please.
It has been confirmed that everything in BG3 will be hand placed and there will no be such an over abundance of loot.
9- Traders Everywhere - That's something I found annoying in D:OS, that everyone, litterally, has something to sell you. Even enemies. In BG, there was a point in going to the town blacksmith to buy weapons, instead of say, the fish vendor or the librarian, or the innkeeper (sorry Winthrop) I don't like to be able to sell and buy everything from everyone, everywhere.
Yeah, can't stand them traders. They are just another symptom of the whole loot problem (a problem that shouldn't exist in BG3)
10- Lootable containers - I understand being able to check and loot every nook and cranny everywhere, most of wich don't have anything in them, just to see if there's a little gold or something in there. I'm a completionnist so it got tedious fast, but I wouldn't mind less lootable containers.
Kind of like point 5. Just don't look in them. That being said, I don't think I would miss all the lootable barrels and crates.
11- Quick loot - Something BG:EE and POE got right, quick loot. POE was the best: you just dropped 6 baddies, just click on ONE body and you can loot them all.
Contingent on other factors, like how much loot there is and how it gets stored. As it is in DOS, I think quick loot would only make it worse.
