I don't think they'll get out of their group either. I think 3rd is what they'll get and it's Europa League for them.
I agree that Lescott isn't a world class centre back.
At full back, they just need to stop chopping and changing. Zabaletta is their best right back, so they need to play him there regular. Maicon has shown that he's well past his best thus far. At left back, it depends really what formation they're playing. If they're playing 3 at the back with wing backs, then Kolarov is your man, Clichy is the best option for a flat back 4.
In midfield, Toure's a one man band at the moment. They didn't strengthen enough in that department over the summer and they're paying for that now. Nasri isn't consistent, Garcia's been so-so, Silva seems to have good spells followed by a quiet period. Toure is left to run things on his own, which is near impossible.
I don't think City will retain their PL title and I don't think they're getting out of their CL group.