Why couldn't this have been said a lot earlier? Tua was a big puncher with a strong chin. That's about the extent of it. People wanted to believe because he showed some semblance of boxing schooling by using the shoulder roll that he had technical skills. Unfortunately, most boxing fans don't understand actual boxing technique from quantum physics.
Arreola hits harder and has a much better beard then Barrett so I don't know about that. With Tua everything is possbile, but only in the first few rounds and only if an opponent doesn't know how to move or fight tall. The longer the fight goes on, the more clueless and monotonic Tua appears.