Record points total with Real Madrid, record goals scored (121), record goal difference (+89)...his first Chelsea team with Robben etc was very exciting, he turned Lampard from a standard box to box player into a goal machine...even though 2014/15 wasn't an especially sparkling vintage his Chelsea team scored more than Leicester did this season in winning the league...he is the arch pragmatist but he's not intrinsically wedded to defensive football, that's a bit of a cliche. What generally does for him is failing to refresh a team after a two/three year cycle and falling out with too many people.
Something was very, very wrong this season at Chelsea, it'll be interesting to see whether that was a blip (he's been due one) or if it's a sign of an irreversible decline. Fergie often employed the same tactics as Jose in his later years in European games, rightly so as well as you aren't going to outgun the likes of Barcelona on their own turf. For now all Jose has to do is put in a proper title challenge (they haven't had one since Fergie left, not even close) and provide *some* entertainment, they don't have to be swashbuckling and racking up 5-0 wins all the time but the paltry amount of goals scored this season by United is unacceptable. I would not expect him to approach it with the mindset of loading up on 1-0 wins because he knows that won't do. He will have to show more of a willingness to promote youth than he has done anywhere else because that is a major part of United and what they stand for as a football club.
He has wanted this job for well over a decade and I think that is a massive factor. This isn't one where he just sees himself passing through and picking up a few trophies, he's seen this as his destiny for a very long time. He'll also see it as a huge challenge to put one over Pep in the same city. This is also his last real shot at a big club - no way back at Barca/Real/Chelsea for him, nowhere else to go in England after this, doesn't want to move back to Italy or manage PSG/Bayern. After this it's a national job (Portugal or England) or retirement. Can't mess this one up and he is someone who cares deeply about his legacy.
You can bet he'll get rid of a load of crap that United have somehow accumulated and that has no business being at a club like that. Jones, Rojo, Depay, Young, Romero, Fellaini, Schweinsteiger (wonderful player but finished, Bayern don't throw away club legends if they still have a use), Darmian...I think they will all be somewhere else come September. Probably Mata too, he's on the decline I would say and Jose has already sold him once.