Wouldn't be such a bad move to try Sigurdsson in Schneiderlin's place with the protection of Gueye next to him, if the move comes off. I think he could make a pretty decent midfielder and extend his career there. He's never a £45m one but we are where we are.
Agreed. Gana gives us the ability to play with two box-to-box midfielders, provided he actually stays in position (which he has done when asked to play as a lone DM this season).
Gana-Rooney-Sigurdsson (probably not going to happen based on Allardyce's comments)
I'd be happy with any of those midfield configurations.