I certainly appreciate that they are, as you said, creatively led, but I also expected them to properly wrap up the game, which is the professional and fan appealing thing to do, and it's also something they did do in the past. I can understand not willing to make DLCs but leaving the core game in this state is worrisome.
Exactly this. Nobody is asking for any kind of new content, but Act 3 should be finished. People are even willing to pay more money to Larian for doing so. I'm not saying that my trust is completely gone, but simply saying: "Oh, we are tired of this game, so we will left Act 3 unfinished and move on" is not a cool or even responsible thing to do, when people have already paid you money. People didn't pay you money for you to have fun only, people paid money for the FINISHED product. (And just to be clear, I'm not expecting Upper City to be back, I'm just saying: "Fix those broken things which are already in the game, please!") This game is a huge success, so I don't see what's stopping Larian from just hiring a few people to slowly fix Act 3, while the rest of the crew is working on the new projects.