The taint with Mack is he's not a good enough coach, that Tyra "settled" by signing him. He's a good coach. but he's not great. He might be successful here, but he might not.
And before anyone says "duh", that's not a scenario that a program of U of L's stature should have to accept. A lesser program, maybe, but not U of L. You should be able to get a coach that's more of a guaranteed success.
Look at this way... Was Mack any better than the other Xavier coaches when they were hired to go elsewhere? And what have any of them done?...
How many programs had a coach that was a guaranteed success? Us getting Pitino was rare instance. Even for the blue bloods their hires were risks. You can't expect to replace Pitino with a guy that is already a Hall of Famer unless something unlikely happens again. The previous Xavier coaches have all had success but their results don't prove Mack would be good or bad. If Sean Miller didn't recruit like he did, we'd be lauding his elite 8s.