Apart from the rulesets and enemies, classes certainly have great differences from the PHB too, which sucks a lot. I sincerely hope they're going to change all that.
I think what we have is what we’ll get. There will be some tweaks but the core system is set and won’t change much. People say it’s EA so lots can change but this point in development, there won’t be sweeping changes. Well unless Larian is willing to spend another couple of years changing stuff.
I’m going to try to be more realistic with my suggestions.