Is Touré that kind of player?
Strikes me more we require a Carvalho. Multiplied the ability of Chelsea's entire defense and central midfield without being the out and out 'leader'. His qualities augmented John Terry to be the player he was in that rock solid Mourinho back line. He also did all the skullduggery that goes with being a senior, winning player. I could see Agger as the passionate go-to leader (John Terry type) as he relishes it for Denmark and makes those sort of noises about his role at the club.
I once read an interview with Gattuso where he was asked to name the "warriors" in football, players who perform on their top level whenever putting on a shirt, be it in training or on the pitch and I think we need exactly this type of player for our midfield. A dominant player infront of Lucas and if it´s true that we are doing well financially we shouldn´t shy away of spending big again on a top player providing this.
I agree on Agger, to me he is one of the few warriors in the team when fit.
Then we need a full back, a finisher/striker (Klose typ with clever movement and great header of the ball) and a winger (Ince would be great). Four players are a must in the summer in order to raise the competition and avoid performances like this. No excuses next season that´s for sure, we need to establish an entire different atmosphere from next season on, the players have to establish to provide basic professionalism whenever they put on the shirt.