Maybe. Wilson looked like he was holding his own to start the year, and then was routinely targeted and abused by opposing defensive coordinators as the year went on.
The fact that Kliff had such strong words isn't encouraging.
Actually, that Kliff had such strong words is very encouraging. It tells me that after 3 years of accepting the fact that coaches like Vance were forced on him, he's grown to the point where he can be directly critical of a defensive player...and basically of Vance and his coaching. In the last he hasn't really talked much, other than praise and generalities, about defensive players, leaving it all to Vance.