I can totally see the argument for replacing Rice with Henderson, but it is clear that Rice's role is to drop back, allowing the wbs and Phillips to get forward. Maybe Phillips can take that role, I don't know. I know we've had Henderson and Phillips together, late on in games, but I don't see them as a starting DM partnership.
Also I don't think I trust either Rice or Phillips to come on and impact the way Henderson has in recent games. I think he'll keep things as were, but I'd like to see more support from Mount.