I don't think level 10 cap is finalized? I for one would be disappointed with only 10 levels in the whole game... that is not very much progression.
It's not. We know for a fact it's not level 10 anymore in fact.
We don't know what the NEW expected cap is supposed to be, on the other hand.
Larian simply said that they turned out to have too much content on their hand to stick to that cap, so the new one could be anything between 11 and 14 for all we know.
Above that sounds a bit unlikely, I would say."Ops, we made six levels worthy of extra content" would be quite the miscalculation.