That it will come out like DOS2: half-baked and unfinished, still full of LOTS of bugs on the untested content that wasn't included in EA.
This will penalize the people who play through the game on day 1 of full release, as what happened to me with DOS2, before proper fixes and bugs can be cleared. Additionally, the final pieces were noticeably weaker and were revamped over a year later with a new edition.
Knowing Larian's pace, a totally COMPLETE and vetted game might take them into 2023.
