The WEC needs to die. It's horrible business strategy to market the UFC brand nonstop then expect people to recognize the WEC while rarely if ever advertising it on UFC programming. Just fold the Featherweight and Bantamweight divisions into the UFC so every PPV can have at least one title fight so we can avoid PPV's headlined by nearly pointless fights like Mir-Cro Cop. As for 155, release the lower half of the division and have the top half (Henderson, Cerrone, Varner, etc) fight guys like Florian, Gomi, and Guida to see just how talented they really are.
Aldo and Cruz probably shouldn't main event PPV's by themselves, but they'd add a ton of value to the co-main event slots as well as legitimize cards that are filled with star power but little relevance in terms of rankings. Bantam and Feather fights are also action packed and rarely disappoint, unlike their heavier counterparts.
And before anyone says that lighter fighters don't draw...Manny Pacquiao, Marco Antonio Barerra, Oscar De La Hoya, Felix Trinidad, Prince Naseem Hamed, Sugar Ray Leonard, and Floyd Mayweather tend to disagree. In time Aldo, Cruz, Faber, Torres, and others will be just as well known and will draw accordingly.
Lastly, I just want to see the smaller guys get paid. They deserve it.