Well the Tridentine Mass was in its nature not very open to error. All the prayers HAD to be said in order for the next prayer to make sense. Skipping any prayers or changing any prayers would create a domino effect and destroy the Mass.
For instance, the confiteor of the priest automatically led to the confiteor of the servers, then the Indulgentium Absolutionem, followed by the Kyrie which naturally preceded the Gloria. The Epistle had to be given in order for the Gospel to follow, directly after the Gospel the priest would give the homily which had to end with the Credo back at the Altar. Only after the Credo could the Canon start because of the symbolic transfer from the Word to the Eucharistic Liturgy, the Canon is like one huge long prayer book and if you skip anything the next lines seem random and out of place. After the consecration everything the priest says is a “que” for the people to get up, kneel, get communion, etc. Then the Ite Missa Est and final Gospel are neccesary because they teach the faithful in a deep and beauitufl way to…get their belongings and kids together its time to hit the road.
So no I dont think any Priests back then dropped prayers from the Mass, they could have mumbled them, they could have sped through it like a presider at an auction, they could have…well you get the picture.
But in reality the TLM was much more parishoner friendly than the N.O…because wherever you go, when the parish your visting serves the TLM you know exactly who you are. You know your a Catholic, and you know the man by the Altar is a Catholic. But most important of all you know that everything thats coming up (mumbled or not) is 100% organic certified Roman Catholicism, and you are not expected to have to step out of your religious beliefs for the sake of a ecumenical service, a happy clappy Mass, or a hippy priest.
And none of that Halloween mass stuff…