Yeah, after seeing Kessies performance i can see why Xavi is a bit disdainful towards Dejong. The later is a pondering type that is good at retaining and holding the ball, but a bit slow in instincts. Kessie plays the ball quick and direct with instinctive one touch passing, which is what we need to avoid Xavicross. I still would want to see him as holding mid, because his ability to move ball, where it needs to be is great and he does have good eye for a killer pass time to time. He gave gorgeous through ball to Abde, which the later messed up.
In any case, even if he leaves, it would be no great tragedy. Even Nico looked better than Busi in the holding mid role, so that position is up for taking in near future.