I'd prefer this setup with the current crop of players, assuming Johnson can maintain his decent run at the moment (defensively) as a LB:
Reina
Kelly Carra Agger Johnson
Lucas
Gerrard Meireles Aurelio
Suarez*
Carroll
* Suarez - free role
I think this gives us a solid offensive/defensive balance, with Gerrard and Aurelio more than adequate as cover when the fullbacks go forward, or as part of the first line of defence pressurizing their midfield/defenders when they have the ball. In Gerrard's case, this keeps him actively involved in the game, and gives him the chance to win the ball early and use his explosiveness to turn defence to attack very quickly. He and Suarez can swap around in-game to keep his legs fresh and also for Suarez to get his little bites.
Aurelio is our best crosser of the ball from the left and can supply a wicked cross from deep, which makes him ideal for this role. His durability is a problem, but with 14 league games left, and the fact he hasn't played a lot this season, he should hopefully be able to stay fit enough to finish this run. Maxi or Cole could back him up, though you'd lose something with each of them (either crossing ability, defensive nous/experience or in Cole's case - form).
Crosses come from either fullbacks going forward, the tucked-in midfielders peeling out, or Suarez in his roaming role.
p.s. oops... think this should actually be in the other thread on transfer window closed... preferred setup. Can a mod move this? Sorry!