I don’t think this exercise will work. Religious orders are such an integral part of the Church that it’s hard to imagine it without their liturgical influences. For instance the basic form of the Divine Office has such a huge Benedictine influence. Also Trent was an exercise in standardization; besides the orders we’re left with basically two rites, Roman and Ambrosian, not to mention very limited use of the Mozarabic rite. Others have been lost: Beneventan, Gallican, Sarum (which I think more or less went over to the Anglicans during the Reformation), etc.
My experience with anything liturgical is that the simplest idea usually ends up as a huge project. And this isn’t a simple idea! 2000 years of history, not all of it well documented, to consider.
I’m inclined to the opinion that “traditionalists” aren’t so much interested in going back and objectively studying tradition as they are in recreating and fossilizing a specific place and time in what is in fact very recent history. For instance traditionalists give short shrift to the notion that the breviary in use in 1960 really isn’t very traditional at all (unless you’re a Benedictine). It dates back to only 1910 and was hugely controversial at the time; nearly as much as the the current LOTH; and it too caused the tossing overboard of patrimony in the form of discarded antiphons.
IMHO (there’s that pride again

) true traditionalism would be a dynamic study and a careful consideration of why, for instance, versus populum was important to increase the fraternalism in a monastery (again my opinion but the priest acts in persona Christi and the Last Supper was an intimate and fraternal event; a recreation should preserve that notion). I study Gregorian chant; I wrote a paper on the new Antiphonale Monasticum in 2010 (it’s on the Gregorian Institute of Canada’s website); and between two chant books between 2008 and 2010, the same antiphon underwent a mode change from VIIIg to VIIIc because the monks studying ancient manuscripts rexamined their interpretation of the neumes.
Br. Jay also explained to us how VII returned the orders to their traditional charisms, again proving that the study of Tradition from ancient texts is a dynamic field as opposed to trying to fossilize a specific point in time.
The impression I really get is that the mainstream “traditionalists” are really just expressing a resistance to the changes of Vatican II.
The Church has never been static; there have been some huge upheavals; Reformation, Trent, Vatican II. Yet she survived them all, reaffirming the promise Jesus made to St. Peter.