They could split Spiller out or play Spiller/WR in that spot. TEs aren't what they used to be. They are trending towards better receivers than being a hybrid catcher/blocker. The NFL has trended towards have a 'fullback' or 'blocking' TE that they bring in for specific situations.
I think that is what they will do. Have spiller in the backfield and chipping then going out for a route.
Getting this guy, will hopefully let them not have to have TE help as much.