Patch 5 is looking to take longer than Patch 4 at this point. And I wonder if it will be hyped as THE BIGGEST PATCH SO FAR again.
In addition to 5 classes being missing, there are also subclasses missing from existing classes. There are also abilities that NPCs and enemies have that should be enabled for PCs.
It's been about 2 months. Judging from the current lack of any information at all, the earliest that patch 5 may happen will probably cross the 3 month timeline, which would make it on par with patch 4 - and right into Solasta's full release window too.
Now that I think about it, Larian's been pretty radio silent lately, compared to before. Could mean big things are coming in this upcoming patch.