He's not my fave necessarily, but as a general observation this draft is FULL of guys like this: flawed players with one or two very good skills.
If you read different mocks it is not unusual to see one project a guy in the teens, and another have him in the 30s. Rice is at 26 on DE and 34 in NBAdraft.net.
What this tells me is that there is a ton of variation in opinions in the 15-35 range, and not much decline in talent/potential.
A couple of very talented players are going to fall into the late first round, or early second, and we should snag one or two of them IMO. We have some roster flexibility and could have more depending on the whole Pierce situation.
I see Rice as at the high end of that group, with Muscala, Ledo, Snell, Wolters, Hardaway, Goodwin, Withey, Bullock, Crabbe and several others.
I'm not making any specific predictions but I would bet that a couple of those guys turn out to be legit players.
So I very much agree with your general idea: two picks in the 20s-30s might end up being much better than one pick at 16. It gives us two rolls of the dice instead of one, at pretty much the same average level of talent.