No more or less than what the UFC currently enjoys.
Personally I was a lot less annoyed by Brock getting a shot. Yes, he was a huge star in the WWE. However, he was clearly an athletic freak and he had a legit background in D1 wrestling. He also did his first fights outside of the UFC so you couldn't say that he had zero MMA experience.
I would have been much less annoyed if CM Punk had gone the Bobby Lashley route and done some amateur and a pro fight or two first. And that's with Lashley also having a legitimate NAIA wrestling background and multiple NAIA championships under his belt. It certainly doesn't help that CM Punk has no wrestling or serious TMA background.
You basically know that CM Punk is 100% getting a shot off his fame, whereas you could at least make a somewhat thin justification for Brock and Lashley.
Even the pro wrestlers who went into Pride actually had catch wrestling or TMA back grounds. That and Pride wasn't exactly a paragon of virtue when it came to avoiding circuses.
However, the fight game has no shortage of freak show fights and attention grabs over the years, so I suppose it is what it is.
I'm sure they'll grab some new fighter off the amateur circuit or a newly turned pro for his first fight. I just can't see an AC sanctioning a match between him and a real UFC caliber fighter.