For the money, Mo is a decent get. He gives us another ball handler and shooter and let's us matchup differently in certain situations, but overall, he probably doesn't make us much better as a CoJo or Mills would have, but those were never going to happen as Pop knows that the Cavs would most likely be the team he's dealing with in the finals.
He provides some shooting and offense production (good ISO player--see below) that we may need in a series down the line.
Mo's DRPM was -1.74, 50th out of 84 PGs. His ORPM of 1.02 was 24th out of 84 PGs, though.
Offense
He made 40.7% of wide open and 33.9% of open threes this year and 41.3% of catch and shoot threes. Last year, he made 35.6% of wide open threes and 39% of open threes and 40.1% of catch and shoot threes. The thing he can do that Delly cannot is produce offense using pick and roll as he produced .83 PPP off of pick and roll with Minnesota, 33rd out of 66 players who had 200+ such possessions. He is also a good ISO player who produced 1.12 PPP in Charlotte, 2nd best out of 153 players who had at least 40+ possessions. In Minny, he was at 1.02 PPP, 11th best out of 153 who played 40+ such possessions. He was an excellent spot up shooter with Charlotte, producing 1.24 PPP on spot up opportunities, good for 8th out of 266 players with 75+ such opportunities. He produced .98 PPP in Minny, 143rd out of 282 players with 65+ opportunities.
Defense
He defended the three decently well this year giving up 32.7% to shooters who shot 34.2% against everyone else. Last year he was atrocious giving up 40.9% on threes to opponents who shot 35.5% against everyone else. He was atrocious on pick and roll defense allowing .87 PPP with Charlotte, 93rd out of 105 players who played 105 such possessions. With Minny, he allowed .96 PPP, 103rd out of 105 players with 140+ such possessions. He was terrible at spot up defense in Minny allowing 1.11 PPP, 217th out of 241 players on 90+ such possessions. With Charlotte, he was much better allowing .93 PPP, 91st of 241 players.
His ISO defense was good in Charlotte (top 11%), and decent in Minny (middle of the pack)