I think SAF left Moyes with a huge job on his hands (similar to what moyes left us).
He probably fears that if Mourinho came in now and changed things but won titles then either it would mean less exposure for him as Mourinho would be the new man getting the glory OR i concerned about the negative brand of football....
Hed be ideal for us apart from his reticence to play youth...thats something which is a major concern (though he did do this at porto and real).
Most managers who get reputations for playing or not playing youth when you dig a bit deeper you will find that they are not as clear cut mate
Mourinho's first team at Chelsea had quite a young average age for example, Fergusons famous 'win nothing with kids' team average age was young but not ridiculously so by any means - from memory it was over 25 as an average for example
Rather have a manager who gets results and the kids develop slower than a manager who fails and the kids get played, because with the first at leats the kids will still remain at the club, under the second example the kids will just jump ship without a backward look, right now two of the 3 best we have want moves for example, so exactly where do we benefit except from getting good fees which really means nothing to the match going fan who want to see the team perform well and more importantly get reuslts