The old Mass allows people to adore the real presence of Christ, to contemplate quietly the mystery of our faith which is more of an add-on in the new Mass. For example, I find it strange that the priest alone says the Our Father and that the readings are not in the vernacular. For all that I have no wish to advocate change. I have come to believe that the priest facing the people is a fatal error, making the priest the pivotal figure in the ceremony and the relationship between him and us more important than between God and us. Performance becomes all important.
Adoration goes out the door.
Even worse, when a priest doubts the real presence, as many seem to do, they sometimes betray themselves by what they do at the altar, or pointedly omit. Mercifully the old rite throws a veil over these interior battles and saves the layman from the temptation to judge.