TUF just seems like a dated concept. The purposes of TUF were to introduce MMA to new fans, right? Gain mainstream appeal through a show designed to educate new fans on MMA, igniting their interest by showcasing particularly "interesting" characters (Leben, Browning etc). I think TUF has outlived this purpose now, as TUF is hidden away on Fight Pass or obscure FX channels. No non-fan is going to stumble across it and get hooked on MMA.
The other purpose of TUF was to put free fights on TV weekly. But with the Fox deal, we get that, too.
I say time to scrap it. Although if the show is costing more money than it brings in, then you know for sure the new owners will axe it once they get to it. These guys are ruthless.