There is really nothing to wait for.
Foster is playing very well, he's scoring lots of tries and his kicking is fantastic, you don't lose those skills. Lets not forget he is playing on a side with no specialist centre, so making all those tries it's not like he has a gidley or a lyon supplying.
Lomax again, he has to be our long term prospect, if we can offer lance a 4 year deal then , lomax deserves the same.
I would not go with Eastmond and Lomax personally, as this would reduce our long range kicking game. Gaskell and Lomax are great foils and Eastmond can use his talents outside of the half back position. Either at FB, centre or wing. With Gardner ou Eastmond may get his spot on the wing, and finish ironically taking on a role like billy whizz (jason robinson).