IMHO, when all is said and done, C-USA loses probably two to the AAC, and C-USA adds two to fill in for them.
I personally think several SBC teams can still see the long term benefits to being in C-USA over their current conference; for both football and overall improvement in other sports.
IF UAB and UTSA go to AAC, then WKU and MTSU move to the west and we pick up two east conference teams; probably Liberty and JMU.
C-USA East (Virginia - 3, West Virginia, North Carolina, Florida - 2)
Liberty
JMU
ODU
Marshall
Charlotte
FIU
FAU
C-USA West (Texas - 3, Louisiana, Mississippi, Tennessee, Kentucky)
UTEP (For a bit longer)
UNT
Rice
LaTech
USM
MTSU
WKU
Now if I were in charge of the SBC, I would be working daily to make this move; add the following:
LaTech
UAB
Marshall
FAU
Four good football additions and three very solid Basketball additions. Without such a move, I see no need to switch to the SBC.