'Keep banging on'? I've mentioned he's a prop because he's in the prop rotation this year.
Whether or not you think he's a better 13 is irrelevant to his position in the squad this season.
For the record, whilst I don't rate him as an out and out lock, I'm a fan of his and I certainly think his versatility makes him able to cover lock. I also think that playing big minutes in the middle last year saw him regularly found out in defence, particularly on lateral effort plays.
But again, where we think he should play is irrelevant to where he is viewed in the squad and subsequently why he's been moved on.