It looks like DOS2 because it is currently borrowing a fair amount of its assets.
This the TB, 4 party, MP stuff grates more with certain fans of BG1&2. Had the demo been delivered with a more BG-esque UI and familiar music and a party of say 5, we might be only discussing the thread that shall not be named.
As for the other thread, last I looked quite a few had BG games as their favorites but those that didn’t still had BG3 at or near the top of their most anticipated. Yes, that means they aren’t as upset over design changes, but change can be good, new blood can be good. I still say for now wait and see and provide constructive criticism to that which you dislike.
In short BG3 =/= DOS3 it just looks a little too similar for the moment.
