If the SIAC added GS, the two divisions could be EVSC schools (Reitz, Harrison, Bosse, North & Central) and non-EVSC (GS, Castle, Jasper, Mater Dei and Memorial). I would be all for that.
GS could obviously compete for conference titles in some sports (football and softball), but do you think GS would want to take on the higher level of competition across the board? I'm guessing GS is in the hunt for a PAC title in just about every sport, but that wouldn't be the case in the SIAC.