Ok , you've obviously never seen the kid play, or had a kid that lost a spot because of him. For starters he's never played consistently in any position throughout his career. He started as a fullback and 5/8 that would dabble with a bit of prop. Then for the Magpies he'd play on the wing, and then moved towards the centres and has this year found his home in the back row.
Granted he's not one of our first choice back rowers, but he's ahead of Sukkar, Godinet, and should start the off season on par with Geyer and Roberts and see who plays where based on form and fitness over the offseason. Seyfarth should be considered a prop exclusively now. A 5th choice prop.