It's not occasional Wiz-esque brain-farts that Prout's partner will have to worry about, it's routine inability to make a good pass. Wiz was actually a great passer who made huge errors every so often. That's not the same as Prout.
Werenski is already listed at 214 lbs, he doesn't need a glorified bodyguard.
For the record, this club would be better off with Wiz than Prout (just not for the $$$ Wiz was making)