I normally don't respond to you, but couldn't resist this time.
I just did the math on this, and you're wrong. The first number in each row is our pts scored per 100 possessions, the second numbers pts against per 100 possessions. Averages before, during and after Bagley went out are in bold. We were slightly more efficient or equally efficient on offense with Bagley out. Our defensive efficiency was best when he was out too. That said, our defense has remained pretty good since Bagley has been reinserted, so I chalk that up to switching to all zone, which I believe happened around the time Bagley went out.
Bagley In (PTS scored per 100 possessions = 111.3 average; PTS given up per 100 possessions = 107.0 average)
UVA 92.6 95.6
ND 127.5 95.7
SJU 108.5 114.1
UNC 116.4 122.4
Bagley Out (PTS scored per 100 possessions = 113.2 average; PTS given up per 100 possessions = 87.5 average)
GT 112.7 97.2
VT 127.6 89.7
Clem 98.5 85.1
UL 113.9 77.8
Bagley Back (PTS scored per 100 possessions = 101.0 average; PTS given up per 100 possessions = 89.9 average)
Cuse 92.3 67.7
VT 94.0 95.5
UNC 101.4 87.7
ND 123.9 98.6
UNC 93.2 100.0