The surprise with Dinos was the timing of his departure well into the summer between his junior and senior years. If he had announced in April or early May that he was not going to be at Wake for his senior season it would have been much less of an issue. No grad transfer PF was going to come to Wake and play (mostly sit) behind a guy who would be a four year starter in Dinos. By the time he left, pickings in the grad transfer market were pretty poor.
2016 was the class where Manning put most of his eggs in the Harry Giles basket. It didn't work out, but Manning had to put a lot of effort into bringing a guy who looked like a generational talent, growing up in Wake's backyard, to Wake. If he hadn't put a lot of effort into that, there would be a lot of criticism for that. The 2016 entering freshmen besides BChill were projects to varying degrees. Unfortunately for Wake, none of the three panned out.
The way the current college landscape is, recruiting classes need to provide an average of two starters/major contributors. This includes transfers. By this I mean guys who start and/or contribute major minutes (like Keyshawn Woods -few starts, but 25 min per game) by the time they leave school, either by graduation or turn pro.