Obviously I don't like the number of FRPs given up (but these days that's the going price for a young 25 year old multiple All Star who once scored 57 points in a playoff game. It's extremely unlikely any of those FRPs were going to yield a talent like Mitchell).
Mitchell is a bit undersized at the 2 but his wingspan makes him play and seem like he's 6'4" - he certainly doesn't play small.
Biggest issue going forward is obviously the black hole on the wing; too bad Lebron signed his extension - imagine him walking into this situation in FA next year. But I could see the Cavs going all-in trying to sign Andrew Wiggins would be a very good fit with this team.
Overall though it's impossible not to be excited for the team. Garland needed help on offense Mitchell delivers that and then some. If Mobley (whose offensive development is the most important variable for the team's future) can turn into Bosh/KG on offense then the Cavs should be top 4 in the East for the next 5-10 years.
Man, the East is just stupid good:
Boston, Milwaukee, Miami, Philly, Brooklyn, Toronto, Cleveland, Chicago, Atlanta - THREE of these teams will be relegated to the play-in and 1 won't even make the playoffs
For whatever it's worth, several of the respected talking heads love this trade for Cleveland: