I presume it depends on feedback ...
For example 6 members party, adjusting NPC HP, or adding some conversation options ... those are things that can be done quite fast ...
Even that is in my opinion out of the question, at least the 6 member party as that would require a complete rebalancing and UI redesign which I doubt will happen.
I think what you see now is what you will get just with slight alterations like auto-jump and of course more of it.
Larian likely already knows exactly what to add (races, classes, companions) and what not, too and won't be swayed by EA feedback, simply because because everything is already planned out and they don't have time to deviate from that plan. You are basically playing a demo by this point.