With Skrtel, Coates and Kelly we really should have a more balanced bench by now. If Enrique gets injured/sent off, or 2 of the others, we're fucked. Maybe Henderson can play RB, that's about it though in terms of bringing back any of the other players.
I imagine Rodgers has selected such an attacking bench due to last seasons performance from Stoke at Anfield. I imagine he wants to avoid another game in which we dominate and fail to take our best chances.