The fact that *some *changes were made by the Church authority allowed a few people to mandate their own opinions as part of Vatican II. Then they denounced anyone who disagreed with their opinions as being opponents of Vatican II.
Often there would be an announcement that the parish would be getting a thorough cleaning, painting, modernizing the utilities, and…um…a few other updates. Then major changes are imposed impacting the worship environment, all towards horizontalism, deemphasizing God.
The 1970s document by a committee (not the whole USCCB) has long been superceded by the bishops as a whole, but bad renovations continue in place in in many churches, simply because no one has requested updating to the current, more reverent standards mandated by the US bishops.
In my former parish, they would practically create a mini magisterium of their own: “In **our **parish, we all hold hands at the Our Father; in our parish, all the Eucharistic ministers participate in the consecration, holding the host at the same time; in our parish, we…”