I do, honestly, believe that we're going to go to 13 and figure out 14 along the way.
Is scheduling clunky? Sure. Is it a huge roadblock? No.
It just means there are going to be more league games in December and you'll get the occasional busy week (i.e, Saturday-Tuesday-Thursday-Sunday).
Volleyball will stay at 18 league games because the preseason tournaments are too valuable and VB and WBB will just end up playing more mid-weeks which should actually help improve quality of play from leagues that are already pretty darn good.