How anyone feels themselves in a position to pass a conclusive opinion on Besic on the basis of just a handful of matches played and brief cameos defeats me.
For what it's worth, my opinion is that he has shown some good things, not least in the piece of play that led to him picking up the injury against Chelsea -- in which he did something I don't think I've ever seen from either Barry or McCarthy, in that he played a ball forward and immediately set off quickly into the opposition half to be forward enough to receive the ball back. In fact I think he was the most advanced Everton player on the park at that point.
But no I'm not saying he'll make it. I have simply not -- and nor has anybody else on this site -- seen enough of the lad to make any judgement.