Even academics who have no axe to grind realize that there were substantial revisions and changes to the Collects to suit the new theology. This study here references many of the changes:
faculty.caldwell.edu/lpristas/novaetveteraweb.pdf. Note well, the professor who catalogs these alterations to existing Collects uses the Latin originals, not the ICEL translations we had re-translated. IOW, she’s comparing apples to apples. Re translating the Collects doesn’t change the fact that the Latin Editio Typica is what many find “less rich” in its content. I’m not saying its anti-Catholic or even that they have a tendency to lead souls astray. All I’m saying is that the decisions as to what Collects to retain, which ones to edit, which ones to excise,and which ones to artificially import from other Missals tends to follow certain patterns (as the study referenced above confirms). This change led to a style of prayer that I, personally, find less “rich”, even in Latin.
Other authors catalog how negative theology (“Hell”, Purgatory, expiation, eternal loss, eternal conflict between the Christian and the world, heresy, error) was edited out. Furthermore, positive elements were deemphasized (One True Church, merits of the Saints, Miracles).
I have prayed many forms of the Office, and the loss of the Collects used for many, many centuries is the most lamentable casualty of the Consilium, in my opinion. Yes, the Psalms are the Psalms (even though the 3 imprecatory Psalms and 59 “negative” verses were stricken from the LOTH psalter), but what makes the LOTH different from the Psalter are the prayers and hymns that surround it (Te Lucis Ante Terminum verse 2, anyone?). When the Collects were changed to suit new ideas, they dropped an aspect of Catholic prayer that, I feel, should have been carried on.
These are what, in my opinion, make the LOTH tepid and boring compared to the Office of years past. Yes, the obligation was heavy - too much for a layman, IMHO. However, the result that we got was lackluster and doesn’t create much sense of continuity with the prayers that inspired generations of Catholics before us. We could have spread out the Psalms over a greater period without chucking revered prayers.
If people really think there’s no difference in the style of Collects old and new, I invite them to take up a simple challenge: take their new missal (even with the revised translations) and a traditional missal and compare the Lenten Collects Sunday for Sunday. Your eyes will be opened.