I think he made it clear from the beggining that he wanted to win the three major league and so all his work was short term, after the 2007 FA Cup final he wanted to leave for a bigger challenge, when the occasion of leaving came, he took it and went on to win everything years after, now that he "won it all" I think he knows that it is time to do something big with this young squad, not to play Tiki Taka tommorow but more of a domestic domination for the next years a la Ferguson, because Alex was the best in the past 20 years in England and to win 13 Premier League is an incredible achievement, maybe Mourinho wants to win 6/7/8 Premier Leagues again and to do so must be by a change of the approach he'll make to the group and the future mentality he'll install. Stability in ideas is in my opinion the key that Ferguson always had, to see José telling the press "I want tips from Arsene to stay 17 years" mean not only that he wants constant sucess but also how to deal with the big boss and be always motivated, the managerial job is hard and it takes a lot of energy every season to get trophies.I hope the future Chelsea team will take the United model, more young, less big money moves, and the same manager.He certainly has the quality.