Both SSPX and Summorum Pontificum are based upon the normativeness of the 1962 books of the Roman Rite. I feel some nuancing of this position needs to happen.
It is accepted that - for example - 1962 prefaces might be added to the EF. If Pius XI could add prefaces for the Sacred Heart and Christ the King to the Missal, it is not easy to see why Benedict XVI should not add prefaces for the Assumption and the Immaculate Conception. But I feel revision of details in the EF Order of Mass should not stop there. For example, the Rite of Communion should be gently tidied up to envisage a situation in which many masses include a communion of the people. And the the punctuation of the Preface should be corrected to "Domine, Sancte Pater, ...". But this morning I look at the Calendar and at festivals of our Lady.
Pius XII replaced the Octave Day of the Assumption with the Immaculate Heart, and put the Queenship of Mary onto the last day of the Mary Month of May, a day on which the Feast of our Lady Mediatrix of All Graces had previously been spreading, by indult, to more and more places. Paul VI put the Queenship onto the old Assumption Octave Day: in my view, a good move. The Queenship in Heaven of Mary is exactly what the Octave Day of the Assumption is about. But when Paul VI put the Visitation onto May 31, he made a big mistake. The original idea was that this festival should have as one of its themes the Mediation of our Lady - and one of the hymns provided by Lentini was worded to express this. But the idea never beddded down.
What we need is a calendar on which May 31 is the BVM Mefdiatrix of All Graces; August 22 is our Lady, Queen; and the Visitation goes back to July 2, an old dating with ecumenical implications about which I have posted before. The Immaculate Heart could well go onto the Bugnini date following the Sacred Heart; this fits in with instinct of Christian people for First Saturday Masses of this devotion.
That would be an 'organic' resolution of the present confusions.