I've been thinking this of late with the recent prospects coming up, but the UFC has done a great job at building this division. It's above the bantamweight division right now. We all claimed that this division would be a 3-5 man division like BW is right now. Demetrious Johnson will have defended his belt against three differewnt fighters this year, though the Benavidez fight is a rematch. With all the signings, recent drops including two top ten BWs, we have a division. But take a look at the depth and the top tier fighters right now.
Jussier da Silva
Jose Maria Tome
That's a really, really solid division. Add in the Asian invation that is happening. Japan has some really solid lighter class guys. China TUF has a BW division if I'm not mistaken. A lot of TUF guys drop weight after. With one more win Zack Makovsky could also sign with the UFC.