We should NOT sign Aguero to a new deal. This is how great teams die. You have to know when to let the greats go.
On great after great we have failed on that count. The only great that left at the right time was Joe Hart... And that was more happenstance than good decision making.
Silva, a year too late
Yaya, 2 years to late
Dihno, 1 years too late already
Aguero, he is 1 year too late already
And on and on... This needs to stop or are slow decline would be painful.
And while we are on the topic of aging players, time to dead all the Messi talk too. We need youth, vigor and energy. Not fading greatness.