Dan Mirgliotta is a much worse ref than Maz will ever be. On top of his terrible stoppages he has, on two occasions, hurt fighters. He pokes Heath Herring in the eye during the faceoff against Lesnar and he basically tackled some lightweight at the end of a round.
I've said before that I actually agree with the Cain/Rothwell stoppage. Despite being oddly timed, Ben was warned that Maz wouldn't let him take those kind of shots. You can't opt to take 5 shots to the face when the rules state "defend yourself at all times"