We'll have a plan B
Signing Cisse has really given us more options to consider system-wise. The 4-3-3 can now properly work with Ba, Ben Arfa and Cisse as the front 3.
When we have the ball, can see us playing 4-3-3 but if we don't have the ball (or if need be), can change to a 4-4-2 with Ben Arfa dropping back into midfield and onto the right wing, ultimately providing some cover for Simpson (I say this because HBA did well defensively on Sunday like).