I like paragraph 19, ordering the pro-EF Faithful not to "help or give their name to" bodies which impugn the validity or legitimacy of the OF, or are hostile to the Roman Pontiff. This does not, of course, in any way refer to bodies which, while deeming the OF to be both unquestionably valid and canonically legitimate, consider it to be an inferior form of the one Roman Rite. The Ecclesia Dei Commission does not, unfortunately, have any direct jurisdiction over the whole body of the Faithful, otherwise it might usefully have required that those Faithful who strongly prefer the OF should not question the legitimacy of the EF (did I read somewhere that the Tablet's Rome correspondent does question the lawfulness of Summorum Pontificum?) and should not be hostile to the Roman Pontiff. That would provide what we English call a level playing field. Other jolly old English phrases refer to cats and pigeons, and sauce for ganders.
But perhaps I'm wrong; perhaps Ecclesia Dei does have a broader jurisdiction. Para' 8a says that the purpose of Summorum Pontificum is "Liturgiam Romanam in Antiquiori Usu, prout pretiosum thesaurum servandum, omnibus largire fidelibus". Omnibus is not qualified by a clause such as "those who want the EF"; omnibus is just omnibus. The English crib is clearly a bit worried by this, because it translates largire as "offer" ... rather in the manner of the wretched waiter who sidles up to you just when you're leaning over the table to share a conjugal confidence with your wife and "offers" you the pepper: "offer" so often means "take it or leave it but it's here if you want it". But largiri [here we draw a veil over the IV Form error of the Roman official who forgot that largior is a deponent verb] means to give bountifully ...to lavish. This document makes clear that the EF is to be lavished upon, not a minority with a preference for it, but "all" the Faithful.
Isn't that rather thought-provoking? Am I right or am I right? Come to think of it, the very first sentence of UA talks about making the riches of the Roman Liturgy "propiores" to the Universal Church.