I know Uiagalelei isn't like a top QB, but if the argument is that he's not good enough to play at a top program playing top teams, that ain't the case playing Memphis, unless they're better than a typical G5 team. We did see him last year at Oregon State be adequate for a team that had an outside shot at winning the Pac 12 if they managed to win their last two games. He may be a problem, but he can't be the entire problem. He went to Oregon State because of their style of pro offense.
That said, it seems like he's not long to be the starter there. He'll still get an NFL camp invite, though.