I know it's crazy man, but here me out... they had their reasons.
Jonas - didn't like that he was taking a year off before entering league. Cavs wanted to act fast to try and speed up the rebuild. we know now that it didn't work as planned but that's just how they felt going in. *shrugs*
Dummond - they really wanted Beal but when he went #3 they panicked. The idea of a VERY RAW Thompson and Drummond (he was very raw coming in you know this) rubbed them the wrong way. Chris Grant was obsessed with getting a SG to go with Irving and jumped the gun *shrugs*
Noel - jury is still out for him. Hasn't played a game yet. Could be great. Could be a huge bust. Bennett same thing. That pick was still a crazy one. no doubt.
Embid - who knows what they do?