I should say that Po'poola was very complimentary about the BYU coaches, calling them by name and saying he appreciates them and that they are "great coaches." He didn't burn any bridges or even suggest he's better than Emery and Haws. He just said the opportunity at Utah for playing time etc. was better in his eyes.
Plus, his "best friend" in Las Vegas is the Tillman guy the Utes also recently signed.