i think his health issues were a lot serious that were made out to be. i read he was getting nosebleeds that he blamed on too much air travel and the timing of the hip surgery was very telling the way they simply didn't work it right after the season so he could make the 2014-15 season.
moyes.....great team builder and transfer genius but he's hardly the best tactician and he has no european experience. mourinho gets bored and leaves every club he's been at in a few years. jurgenn klopp is the only guy who i can think of who i'd love to see at united who can carry the success.
nightmare scenario is rafa