I tend to agree with Jason on Long, but a little analysis could change me. If I knew the improvement at LT would improve greater than the loss of greatness at RG, I would consider it.
Looking at available talent, Whitehair could fill the RG role without anyone saying we need help at that position. But, how much of a drop would he be? Now we have an open C position. Grasu was drafted in the 3rd to be that guy. Is he healthy and strong enough to be the guy we need him to be? Does he fit what Fox the needs within the blocking philosophy, since he wasn't drafted for the current system? After that, what is his drop off from Whitehair?
Lastly, and where Jason and I may disagree, is continuity. Since this unit has been together for a couple of years, will it change their growth curve in continuity if positions are switched? If they can retain some of their cohesion, there's little doubt there is more physical talent on the field. It could possibly give Jason a superior talent pool while giving the continuity I like, but there are sooo many questions that he and I have no answers for.(player desire, real health, ability and adaptability)