I think he gave enough hints in pre-season that he could have done a rotation job with Busi this season (50/50 minutes more or less, better form getting the bigger games) though. And then we could have put 100% into shipping Pjanic out and not give him any hope in staying.
All his moments in that clip(bar where he moves the wrong direction into 2 Bilbao players and almost loses the ball, instead of passing to the open man left) showed more understanding of what his role is and quicker releases than Frenkie versus Sociedad.
But yeah, if Xavi doesn't trust him then this move can do him wonders.