After watching it in pause-and-go mode several times, this is where I'm at too. But it is close and I can understand seeing it both ways.
I personally like the hand-touch takedown rule. Maybe most of you forget the way this rule has progressed over the years; from "A takedown shall be awarded when in rear-standing position and beyond reaction time one or both hands of the opponent are bearing weight", to "Hand-Touch Takedown. To award a takedown, reaction time is not required in instances in which a wrestler has rear-standing neutral control of their opponent and from the standing position the defending wrestler's hand comes in contact with the mat."
The previous rule had tons of subjectivity, while the current rule has none. The question in the match we are discussing may be one of whether Paniro was in a rear-standing position when Mauller's hand was touching the mat. He wasn't to me.
Add to our discussion the idea of a quad-pod (like freestyle) as someone noted if this takedown rule is completely removed...I'm not a fan of doing that.
Finally, these refs struggled too, and they're the supposed experts. I have them in front of the monitor for over 5 minutes, which is unusually high. If the takedown isn't clear after that amount of time, I think they did the right thing. Since I'm talking referees, I'm glad they have third-party reviews at the post-season tournaments.