I think it would help Larian if, at any point during game play, the player was able to freeze the game and enter thoughts into a dialogue box. After sending the message to Larian, the game would then proceed.
There would be a couple of advantages to this. Firstly, all the feedback from all the players pertinent to a particular moment in the game would be collected together. That could facilitate game improvements and bug fixing. Secondly, a lot of good ideas are lost to developers because players never mention them as there is no mechanism, or they forget or it is too troublesome. People playing the game want to keep playing it, not launch a browser, register an account, put in their system details, format a bug report etc. If the feedback had a categorize feedback menu, that could help filtering later.
I think an in-game feedback mechanism would be a huge asset to Larian. How else are developers expected to hear the "Oohs!" and "Ahhs!" or see the expression on the faces of the people playing their amazing game?