Another Idea,

Fight night, should have an option to develop a fighter in your online career.
But the areas of development should be much braoder...
Aside from Unlocking Base Styles, Puch Styles, Signature Punches etc, they should actually be ugradable and even have the capaticty to be refined to better suit yor own unique prefferences.

At least then, every fighter would be different.

Also, they need Downlaodable content. You know, Paulie Malagnaggi's latest hair style or Loui Collazo new Tattoo