If inglis went to the Cowboys or broncos it would force boyd and coote to the wing (you may have noticed it's inglis that fills into fullback in slaters absence for australia and Queensland not boyd). If inglis was at the roosters at the start of last season rts would probably off stayed on the wing, but now that rts has had a season at fullback and proven himself it makes things harder. Rts might be pushed to 5-8th, a move that's been proposed before, but most likely because they are pretty even as fullbacks, but inglis is also a great centre and rts is wasted on the wing you'd have inglis in the centres purely because it's best for the team not necessarily because rts is better then inglis.
It's similar at a rep for slater. Hayne, slater and inglis have been the best fullbacks over the last few years, you'd rate all three as 9/10. But because hayne and inglis are also great in other positions (both are also 9/10 centres, hayne is 10/10 on the wing and inglis would probably still be a 9/10 on the wing) while slater would probably struggle in other positions (he'd probably be 8/10 winger and 7/10 centre) if you had slater in the same squad as hayne and/or inglis you'd play slater at fullback simply because it's the best fit for the team not necessarily because he is better then hayne and inglis.
