What I was able to do in a league in which I am the commish was to have 8 teams, you play each team twice, two rounds of playoffs (including the championship)... so the regular season is 14 weeks, first round of playoffs is week 15, championship week 16.
Obviously, it's a little late for all of this. But when you get to 10-12 teams, there's no amazingly fantastic way to run things anyway.