Anthony Grant inherited a program that Jeff Capel had elevated. When Capel took over in 2003, VCU hadn't made the tournament since 1996. When Grant took over in 2006, he was lucky enough to have the best player in VCU history for all 3 years. Capel recruited Eric Maynor, but only got to coach him for his freshman season. You have no credibility whatsoever if you think Capel was mediocre at VCU. Say whatever you want about his stint at OU, but he did a good job at VCU. That is a fact.
Stallings inherited a team with no PG, but more than enough talent elsewhere to at least be on the bubble. He won 4 ACC games. No coach worth a damn is going to inherit a roster with multiple future pros, including a current NBA player, and go 16-17 with 4 conference wins. Then he chose to blow it all up and go for a long-term rebuild. Ignoring that he had done nothing to earn the goodwill necessary for such an endeavor, the simple fact of the matter is that he lacked the recruiting chops to ever make that a reality. I'm not just talking about his lack of charisma either, his talent evaluation was subpar as well. This is the guy, after all, who chose Payton Willis over Carsen Edwards. Out of his depth, out of his mind and out of time. It's really hard to believe that you can rationalize calling Capel mediocre at VCU while maintaining that Stallings was a good coach.