It is always bad decision to let him go, there is no way that rooney is going to leave the club because he is a living legend there unless there is another club in china or usa that wants to give him huge amount for his weekly salary. He rather retire then leave the club however money could always change the decision
He plan to retire from English international football after world cup 2018 , he might be drop from the England squad by Sam Allardyce if Rooney choose to move the lower level league. He still want to achieve something with England, so I don't think this deal will happen in next 1-2 years.
Yup, the way I see it is if only Mourinho could get what he wants without upsetting the United board and the fans, he would get rid of Rooney. He's beginning to look more like a liability than an asset on the pitch. But I'm still hopeful he'll get back to the 'old Rooney' under Mourinho. Just give him time.
The ‘old Rooney' will be play in front forward position. He should never be drop in midfield position. He can't handle both defence and attacking. But it's unlikely to be happen under Mourinho management. Maybe he can change Mourinho mind by scoring in this Manchester derby game right now.