It's fairly simple. A lot of things were said during the early EA phase that I think aren't panning out in reality. Considering the sheer obsession the fanbase has towards every little word being said (one only needs to look at the 2 year EA anniversary thread for this, for people somehow expecting any sort of announcement not just at the anniversary which would have just looked bad to the wider gaming public, but also at Halloween due to a freaking ghost emoji), what happens when it turns out Larian fails to meet expectations?
The crap over reactions would be nothing compared to the possibility of multiclassing not actually making it in at launch, as an example.
I don't blame them one bit for going radio silent at this point.