There's nothing wrong with the novus ordo, it's just fundamentally unserious. It's too easy to be bent to the whims of a particular priest.

The old Rite has, or rather had, the same issues with priests regularly skipping or ad lining parts of mass, but the novus ordo did nothing to stop that. Priests still regularly make up parts of it, but due to how clerical vestments and the demeanor that's grown up around the novus ordo it has a much less serious appearance.

If they wanted genuine reform they should have been stricter in the offering of mass, demanding greater liturgical discipline. But they went the other way. The vernacular did not one thing to help people understand what was happening. I would say now practicing Catholics knowledge of the workings of mass are terrible, perhaps at a historic low. Just in terms of practical knowledge about the liturgy of the Church. The feast days were gutted for a simplification that's still wildly complex.

The reforms were just that, overly complex and obscure in the name of simplicity. And language is absolutely a part of that. The old English translations were childish, the ones now are somewhat stilted. It made mass mundane, at the worst possiable time. Relgious worship should be elevated, by language, by demeanor, by dress. Having a sacred language does this, it's probably the most important aspect of this. More than dress, which is very individualistic, and demeanor, which is influenced by language used and dress. You speak differently in a courthouse than a barn after all. Why should religion be any different. Why not not so?