The defensive weak link in our starting guard rotation is not Mike Conley. I guess it could be argued that because Donovan is such a poor defender we need someone who is capable of making up the difference. That guy certainly isn't Brogdon who is probably a worse defender than Conley.
If we are going to be a significantly better team defensively, then Donovan has to step up.
Conley is actually one of our best perimeter defenders. He's still really quick for his age and does a much better job against small and quick scoring guards than the overrated Royce O'Neale. Donovan and Bogey are definitely the weak links defensively in the starting lineup.