From what I gathered, Larian seems to only have this forum for feedback and suggestion as well as their twitter page. Those seem to be the only places where we can engage with Larian about Baldur's Gate. I don't have any issues with that and I think it's pretty useful as long as we stick to actually giving feedback about the game in terms or how we could make it better or report any bugs that we may find.
They also have the main feedback channel
that you can reach through the launcher for example.