I can't believe so much of these rumors in here are taken as facts. He said this, this said that, he feels this, MU/management believes that... On top of that, the sources people rely on for these discussions are simply unreliable and most likely false. People, please calm the f down.
Regarding the management, I don't feel like they could have done much else. They have consistently said that Vidal is not for sale unless someone steps up with a big - huge - chunk of money. Also, Vidal has to want to stay, which makes complete sense. If someone does show up with the money, I believe accepting the offer would be the right thing to do. I love Vidal I do not want to see him go but if the right offer comes in anyone is up for sale. However, then we have to have a plan b ready be to set in motion for someone to replace his spot. We do not know if Marotta and co. does have this, but we can assume that Vidal won't leave because there simply is not enough time to find and finalize a replacement for Vidal.
I don't think Vidal is leaving. I have stated this on several occasions and I still believe so.
Finally, as you see I can only assume and speculate. I don't mind anyone else doing that and not agreeing. Some of the discussion here, however, seems like its dealing with facts and not what is likely false rumors.