I think you're right to point out Miles was off his game tonight. I thought it was telling that his most comfortable offensive move of the night was when his brother threw him a pass and he banked in a short jumper. I wonder to what degree the two of them playing together gives Miles confidence, or if Mason knows when/where to get Miles the ball, or maybe its just a coincidence.
One thing I wish the coaches would work harder on--why do both Plumlees still have the bad habit of reaching in for the ball after the other team grabs a defensive rebound? They have probably done it 10+ times this season and gotten called for it every time. I can think of no times when it resulted in a steal.