At LG and C it really comes down to this: Which is greater?: Darling-Gauthier OR Gauthier-Linder/Gaynor. Me personally I believe the current 5 will be the group come week 1. Doesn't really matter to me if Gaynor can beat out Linder because he's currently not a starter anyway. Also, as high as I am on Gaynor, I don't see him being better than Darling right now because I expect Darling to be much better as he settles into his more natural position.
Donaldson is a lock at RG for this season. Next season? Could end up sliding out to OT, but I think his size and strength is better suited inside, despite his LT feet and elite athleticism. If we do end up signing Cleveland Reed and he shows he can hold down the RG spot as a true freshman, then we could see Donaldson moved to OT. But that only happens if Reed is one of the Top 5 guys. To do that he would have to be better than at least 3 of GBJ, Herbert, Hillery, Gaynor and Dykstra-assuming TSL and Gauthier as returning starters which seems very possible imo. Personally I would prefer having St. Louis and Donaldson (regardless of sides) at OT next year with presumably Gauthier/Gaynor manning 2 of the inside positions. All depends on Herbert/Hillery/GBJ developing at OT so we can keep ND55 inside.