Look at number 31 (Moody Coliseum renovation & expansion) (link below) on the the campus master plan. It appears that the added space at the southwest corner of Moody and the added space at the northwest corner of Moody could accomodate separate practice areas/courts.
http://www.smu.edu/campus_planning/Master_Plan2001.asp
Two new practice courts?
It makes sense. If the basketball and volleyball teams can practice without using Moody's main court then the arena is available more often for cleaning, maintenance and additional cultural/community events.
Added space on Moody's north side could be a food/refreshments court or coaches' offices/meeting space. The new space directly in front of Moody's existing main entrance could be a grand new entrance or coaches' offices and meeting space or a food/refreshments court.
Lot's of possibilities.