Completely agree with this point in particular. Without having the added pressure or expectation of conforming to a certain attacking template because of the club's ideological bend, Mourinho can go about the task of setting up the team in his image - efficient, industrious, edgy (want to say German, like some of Hitzfeld's teams that blunted a fair number of technically superior oppositions - but that might be too stereotypical). A bit short on the wow factor, but definitely full of substance from front to back (like peak Chelsea in the mid 2000s - who were imperious in their own way despite not having the flair of Rijkaard's Barcelona).
If he isn't burdened with superstars who aren't swayed by his resume or aggressive demeanor, that's even better - because he can take ones from a rung or two below (like Sneijder, Milito, Lúcio) and build a more cohesive and single-minded juggernaut using his cult of personality and motivational ability. At clubs like United and Madrid, there's a sense that he's stuck between two approaches - his own: where he doesn't have to answer to anyone regarding the aesthetics and can cut corners to win at all costs, or the one that is expected of him to fully assimilate into the traditional approach of the team on top of the expectation to win. That inherent dissonance is troublesome, and Madrid never really came across as a trademark Mourinho team from a structural perspective (too top heavy with a soft underbelly) - which cost them in some big moments (eg. the 5-0 loss at Camp Nou in his first first season - no way would any pre-Madrid Mourinho team commit unforced errors and capitulate like that).
Hoping he manages to find a balance between the two aspects at United (blank canvas where he can create something abstract vs recreating Las Meninas even when it leads to him being at odds with his innate spirit), especially when he will have a greater say in terms of personnel changes and overall squad building from the bare bones (relative to Madrid). Though it's telling that he's already making references to our attacking play - as some sort of defense mechanism against potential critique regarding the style of play, and United's traditional image as a club that built its reputation on attractive football and youth players.