Interesting Hubie Brown on ESPN this morning. His explanation on Mozgov was despite the 28 points, the matchup was Mozgov on Iguodala and it killed Cleveland. Mozgov was crashign the offensive boards, Iggy was taking off, so when GSW got the rebound, they had a 3 on 2 everytime and got too many easy looks.
He didn't outright say it but seemed surprise Blatt didn't just put Mozgov on Green and Thompson on Iggy, would have been the same thing with Thompson crashing the glass, but he's much faster end to end getting back on defense if he has to.
He thinks if he were coaching he'd go back to his base lineup for Cleveland, said he never gets why teams adjust to the other team and wind up matching lineups with less talent(and LeBron of course) instead of just saying that's your best lineup, this is ours, let's see who wins.
The other unsaid thing in all this is a big reason the small lineup works better is it's harder for Cleveland to "hide" LeBron on defense so he can rest. Not sayng he's not a good defender, he is, and he's played very good D in this series, but he's usually guarding Barnes or Green or someone who hasn't been shooting much and it an easier cover. In the smaller lineup they are putting him in more situatons where he has to expend energy and it wears him out eventually because he's playing so much and doing everything on offense.