Kavis already works for ... saw him on the sideline with someone else this week, Winnnipeg? Edmonton? Ottawa? Can't remember.
I have nothing against Quick basically because I know next to nothing about him. CC did admit last week that Quick is calling SOME plays and is gradually allowed to call more as the weeks go on. The defense IS improving week to week even with the constant personnel changes.
Benevides on the other hand is a proven excellent DC, but whether or not they actually need to make a change I can't say at this point.
For instance, does Benevides have a magic wand to make Connop better? Doubtful. In that sense he is no better than CC or Quick or anyone else.
Also, just like it is NOT the OC's choice whether or not to kick or gamble on 3rd down, that is HC (the OC merely chooses the 3rd down play from his chart after the HC gives him the nod), going into prevent mode with over a minute left is usually NOT the DC's choice either. The HC will (or at least should) inform the DC when to go to prevent and the DC will simply pick the next play from the prevent list on his chart. In that sense as well, Benevides would not be able to do much to improve the last minute collapses no matter how good of a DC he is.
Now, could someone like Benevides figure out how to say ... get an effective blitz from all these rookies and walking wounded? Now THAT could be a good move, but that's also a big if.