3 Divisions option
The option of having 3 Divisions would be helpful and the reasoning is this: great for those 12-team leagues to play each opponent within their division twice (now that there's 18 weeks in the NFL season), those leagues who reward their season divisional winners has an option to do so to 3 teams, and Yahoo! would have an advantage over other fantasy football platforms to have this option. (This shouldn't effect playoffs). Our league decided to reward season divisional winners because it motivates managers to be competitive throughout the season.
Alex Hudimatch commented
This seems to be functioning. I currently have 3 divisions of 4 and there are options to allow division winners to make the playoffs (as top 3 seed or based on overall standings)