WE had a thread discussing this very topic a couple of days ago. But here is my response to your question.
IMO that would be the worst thing they could do. They need to get one more year out of Wells. With Robinson lining up at LG, it will benefit him greatly to have both Long and Wells along side.
And without having to worry about picking up the garbage that usually got by C. Williams/S. Smith last year, having the two horses (Saffold and Robinson), he can focus on getting to the second level, which he excels at.
I really don't want to go into this season with a ROOKIE starting at LG, and what amounts to a ROOKIE starting at Center.