i think that 145 should be the lowest weight class the UFC has at this time. the star power isn't really there at any other weight class. i mean, a title fight (other than Faber Cruz) at a weight class under 145 can't carry a PPV. instead of giving these guys the option to drop another 10lbs and avoid the devistating Aldo, I say make them fight him. heck, if you want to, lets have a 145lbs class and a 125lb class, let the 135ers pick so that these 3 weight classes arent so thin. could you imagine how thin every weight class would be if it went 125,135,145,155,165,175, etc etc?
in conclusion, I say lets keeps the 125lb weight class for your mighty mouse sized guys, but make the 'tweeners pick between that and 145.