I don't think Aguero is finished but (as you've quoted Fergie and I'd imagine Pep is the same) you got to know when to think about replacing players. Agree about the goals, they have some good players who will always do the business in a poor league. Doesn't necessarily mean the squad's not on the decline though.
Aguero is a beast. But he is so injury prone and that will probably only get worse as he ages. You can understand why City play him and want to keep him as their main man, but they must be thinking about a replacement for him at some stage. Trouble is, how do you replace Aguero ? And at what cost ?

