We have no idea how far along they are in house.
Exactly. I'm pretty sure, and it would make sense, that Larian has way more done than a part of Act 1
If we expect them to integrate our suggestions, I don't think that matters much. A lot of what people are identifying are pretty fundamental issues.
Most of the things that are complained about seem to be generic simple issues related to 5e rules ( like changing a few numbers used in formulae, or switching on/off features ). They may be fundamental issues for those that complain, but they are not particularly heavy on development time.
The things that take real time are art assets, environmental design, acting/voicing, animation, pathing the story, scripting cutscenes and adding the "physical" in-game manifestations ( mainly involving vfx and animation ) of as yet unimplemented rules/setting content.
I have no idea whether Larian will "fix" any of those fundamental issues ( I suspect some will be, not all ), but they will have almost no impact on the release timescale. Without current;y having even the full extent of Act 1 or PHB content available, it is difficult to judge how long the game will be in EA, but unless Larian are really sandbagging, it won't release until 2022 or later.
