I rewatched the game on Sunday. Skipping between plays you can see everything in maybe an hour.
I made a point to watch Utah's defense on pass plays to see if they engaged receivers like they did on the Hold call.
I was very surprised. They don't actually press or jam receivers all that much. And when they do, it really doesn't look like *that*.
I was left satisfied that this was a totally appropriate call. You cannot grab and hold a receiver as he runs by you. It's not even controversial.