Over means “on top of” the dalmatic for a deacon, the chasuble for the stole. In other words, the stole is not supposed to be visible. It means that the dalmatic and the chasuble are the last things that the clergy put on for their vesture. Thus, it is ilicit to put the stole on top of the dalmatic/chasuble if the GIRM and RS say that it is worn beneath said dalmatic/chasuble.
You might think that these are minor issues, but, the preaching of the Gospel also entails obedience. Regarding the proverbial starving child, this is an argument that many use who try to downplay the importance of norms. You may not see this as an issue worthy of calling clergy out on, but, again, if we are not going to be faithful in what are seemingly minor details, how can we be entrusted with the “larger” ones? Flippancy in one all too often leads to flippancy in the rest. My best friend is a minor prelate, arguably the best priest in the diocese. He cares about the rubrics. He is faithful. He is also one of the finest homilist in our area. Yes, he wears a cassock. On top of that, he wears his alb (a very ornate one) with his cincture and then his stole. On top of all of that, he wears a chasuble. Were you to make that argument to him in the diaconate classes he is teaching, he would probably tell you the same thing I am telling you.
Now, Jesus never condemned the liturgical practices of Ancient Israel because these were dictated by no less than His own Father and these prescriptions all found their fulfilmment in Jesus.
The bells were never abrogated, contrary to what some may say. They are used at Masses celebrated at St. Peter’s Basilica by no less than the Holy Father, Himself. Pope Benedict provides the best example of how to properly celebrate the Holy Sacrifice of the Mass. The deacons serving with him also provide excellent examples of how to best exercise that office.
Regarding the abuses, it is a sad and lamentable misinterpretation of the Second Vatican Council wherein folks were too eager to follow the alleged “spirit” of Vatican II than what the council documents actually said. It might help for you to read Redemptionis Sacramentum in its entirety. This is a must-read document for anyone in formation either for the priesthood or the diaconate. You can find it here:
adoremus.org/RedemptionisSacramentum.html
It should be read in tandem with the GIRM.