Then I think you're misunderstanding the role of Pope. Head of the church is not going to be a licence to do whatever you want come what may, it's a political juggle between the Vatican power structure, the wider Church apparatus, as well as the laity and wider public image, and essentially being head of state for the Vatican.
Ordering Bishops to use their accommodation in a certain way may be seen as an unhelpful and unpopular way of initiating his view of good practice. He's done a lot as Pope to reach out and open the Church up. This year, for example, has been indicted as the Year of Mercy; this isn't just words, it's sent out to all Catholic churches, schools, etc. The Year of Mercy actively encourages care in the community, etc, and I know that local Catholic schools in Manchester have taken this up with student visits and community engagement -- I think this is a good example of the Pope's benevolent encouragement for action on poverty and community cohesion.