No doubt, the MAC is still a guard league. But a MAC coach (I believe Charlie Coles) once said "The MAC is a guard league ... but good MAC guards win with good MAC post guys."
Now, in his era, one good 6-7 post guy (Wally, Ira Newbill, Alex Shorts, Ohio w/Trent or Brandon Hunter) was all they needed. Now, even at the mid-major level, most good teams not only have guards, they have TWO post guys. That's why you see so many teams loading up with bigs, even at this level.
As the season wears down, good bigs start to play up.