Funny you mention those sort of weight class changes when Joe Rogan was mentioning the benefits of adding a 195lbs division on top of what you have now in his Bell Brothers podcast.
If the talent pool was deep enough I could see that but otherwise a lot of us have expressed interest in changing things up at that level for a while. Heavyweight covers a lot of ground with a lot of untapped space, but the talent is barely there now as it is. The future you see seems likely, it's all going to dry up. I was able to dig this up from some of what we were saying in 2013:
http://www.neogaf.com/forum/showpost.php?p=54908088&postcount=11342
Lightweight (150lbs)
Welterweight (170lbs)
Middleweight (190lbs)
Light Heavyweight (215lbs)
Heavyweight (265lbs) (235lbs)
That was an era where guys like The Reem could juice up like it was going out of style and he had to cut down to 265lbs to make weight, but nowadays that seems pretty silly to start a weight class there. I'd change Heavyweight to 235lbs and maybe drop LHW to 210lbs, but that's about it. You'd have guys like Conor and Aldo at 150lbs, some LW's could drop down but other cats would kind of be forced out or forced to bulk up. I don't see where Cerrone fits in this weight class scheme, for example. He would have to cut a lot to make 150lbs and he'd need a lot more mass to stay competitive at 170lbs. There would be some sacrifices for a new streamlined weight class order.
The fighters would also get
paid well in this theoretical scheme, but that's another story altogether.