I think the bag of running backs they have now, with a line that is not as good at run blocking as when Lang and Sitton were in their prime in GB, would work fine. Lotta diverse talents there. Short yardage, some speed and pass catching. Can do a lot with that.
They definitely need a WR to step up. Even Allison becoming a factor might be nice but I think extra TE play has reduced his snaps. But Janis/Davis haven't made the jump.