I'll try to stay on topic too because this thread contains valuable feedback, it would be a shame to close it
My single biggest fear with BG3 is if the party control system stays the same. I absolutely loathe the chain thing. I understand why it's there, that it's better for people who play with a controller or for multi-player. What I don't understand is why there's no alternative. I grew up playing BG2 and Starcraft and it's just much easier, less cumbersome, whatever synonym you wanna find to select your party by "boxing" with the mouse. I can deal with a lot of slightly disappointing things regarding story and combat but if the game just doesn't *play* well for 80+ hours, it' s a huge no.
Another one is that they will keep all the junk that there is in the game right now. I feel it's improved when they introduced the "you need to eat food at camp" update but there still so many useless stuff lying around: knives, forks, plates, empty chests, etc. With the inventory management being what it is, I fear it's going to be really tedious the more you progress in the game.
I also fear that they will give in to some easy and out of place fan service. I really really really don't want to see Minsc in BG3 or any BG2 companion for that matter. Let them stay dead as they should, they are still available in those games. Unless they come up with a well thought out, coherent, that makes sense within the lore justification but I fail to see how that's possible.