Why a lot of the changes were made, I don’t know; I wish some of the changes hadn’t happened. But some I can certainly understand. For example, proclaiming the readings (and having more of them) facing the people (as per the new rubrics and GIRM) and in the vernacular (permitted under the new rubrics and GIRM) so that they can hear and understand the Scripture proclaimed each day. Even having parts of the Ordinary in the vernacular (though there’s much greater argument for having that in Latin). The Prayers of the Faithful with petitions specific to the congregation and the day. Having people actually hear more of the Mass prayers (Latin or vernacular) - I get chills (in a good way) when I hear the words of Consecration, as opposed to reading them off a page. Having the people - as a rule rather than an exception - say some parts like the Et cum spiritu tuo, Confiteor, Suscipiat Dominus sacrificium, Kyrie, Gloria, Credo, & Sanctus rather than just the servers or choir.
Unfortunately, the good was generally implemented with lots of bad (abuses) or unneeded and not preferable (some of the other changes to the Missal or to what was permitted). But that doesn’t make the good changes bad. And it’s not a new Mass, it’s a new form of the one Holy Sacrifice of the Mass.
Ultimately a valid Mass is a valid Mass, so they do accomplish the same in that sense. Of course, validity is not the only important aspect of the Mass, but it is one of the most important! There are very reverent OF Masses out there as you note, although not many as there should be - but a Eucharistic Liturgy doesn’t have to look precisely like an Extraordinary Form Mass in order to be reverent, either. As much as I love Latin, ad orientem, kneeling to receive, chant, and so on, I’ve seen many English, said, versus populum Masses where people stood to receive that were nonetheless reverent.
The theology of the two forms of the Holy Sacrifice are the same - although admittedly in some ways the EF is more precise and eloquent. But there’s a line somewhere between being precise and eloquent and being wordy and repetitious. I’m not sure where that line is. (In fairness, in reference to the Ordinary Form, there’s also a line between “noble simplicity” and minimalism and I’m not sure where that line is, either.)