We played with a flat 4-4-2 for the majority of last year and finished 5th, Swansea will be no where near there by the end of the season.
Also Nathan Dyer is a far better winger than Marv, from what we've seen anyway. Michu also has a far better goal record than Ben Arfa even before he was pushed forward, I mean I love Ben Arfa, but he's not a better goalscorer than Michu ffs. Michu also has an aerial presence which Ben Arfa just doesn't have.
Basically dropping Cisse in order to play Hatem Ben Arfa in the "Messi role" would be mental.