The first time he left it really hit us as a club. This time, meh.
So many need to go but stability dictates not as many as should go. Rooney's leaving is up to the manager and Brands. Obviously if Rooney spits his dummy he has to go. But if he accepts whatever role the new management has in mind then he can stay until he is replaced properly. I would hope that role is as sub coming in to help close out games or turn them around where 10-30 minutes of high intensity Rooney can really impact against a tiring opposition.
Either way, a good manager could weigh up the pros and cons of him staying versus leaving and what he thinks is best. I don't think he'll want to leave the north west of England so he's limited in what his choices are. Going to the US for a couple of years is more than probably a huge decision with a young family.
I wouldn't waste any passion on what happens with him now. We're fine whichever choice he makes.