Yeah it is very much EARLY Early Access, but actually they stated up front EA would only ever be Act1, witht he promise of the full game at 1.0 release. So even with the core mechanics fixed and polish and classes etc... we won't have the full game at all in EA, that's what I paid for.
Not really. This is already an early beta to be honest. The mechanics and system already stands, at least I do not see that Larian has the intention to change anything like removing D:OS influences and such, and all that is left is bugfixes and adding more content.