What would have happened if we had not had Wheeler on the bench in the Grand Final when Wellens went off? We would have had a second rower on the wing (Sia or Dixon probably) and Leeds would have won by 30. If we had players like Lee Gilmour, who can play anywhere, in the team I would tempted to agree that a forward would be more useful. But we don't so Wheeler allowed us to continue with a sensible backline and all most win it. May what we should be saying is that we need more utility players?
If not given the chance off the bench players like Makinson, Foster and Ashe may have spent all last year in the second team.
If we did have an interchange hooker like everyone else we would not have Roby, the best player in the League, on the pitch for half the game. Leeds did this with Buderus and it was a waste.
In the end it is Royces call, if he wants to play with a back he can have a back. If he wanted to have 4 forward he could do that. There is nothing wrong with either way of doing it. As long as the team is playing well and are getting results then he can have whoever he wants on the bench. In the end it is the results that count.