August 14 is a day to say Vespers from some form, any form, of the Roman Rite which precedes the Bugnini 'reforms'. So as to have the magical experience of that great shout of triumph and joy suddenly going forth: Assumpta est Maria in caelum gaudent Angeli laudantes benedicunt Dominum. Compare that with the pedantic Marian minimalism of the Liturgy of the Hours. You can just imagine those grim committee-men sitting round their table ... "We really had better begin the Assumption by setting it in the theological context of the Ascension of Christ". Let us hope that they are now suffering some sort of Theological Context in some sort of painful place. By the way: try looking through the actual prescriptions of Vatican II and see if you can find anything that could conceivably be seen as a mandate for such tinkerings.
Even if you use the Pius XII forms, you will still get Ave Maris Stella at II Vespers, despite Fr Genovesi's dominance of the rest of the Hymnody. In Pius XII's time they at least kept Ave Maris Stella for II Vespers on most Marian Festivals. Bug knew better and he knew wrong.
The real loss in 1951 was of the Collect for the Assmption. We beseech thee O Lord forgive the offences of thy servants: that we who are not able to please thee by our own deserts; may by the intercession of the Mother of thy Son our Lord be saved. It was replaced by a modern composition which I would describe as a dollop of dogma followed by a platitude. The older collect emphasises the ancient conviction of East and West that the purpose of the Assumption is that our Lady might intercede for us; it reminds us that only through the Mediatrix of All Graces, reigning body and soul in heavenly glory, can we attain Salvation; it always reminds me of the homilies of the Greek Fathers, culminating in S Gregory Palamas, about the Mediation of our Lady. And of the plea one hears in the Byzantine Rite Most Holy Mother of God, save us.