If you add more sort filter options, you potentially add needless complexity to the device. There is currently nothing in the UI (and presumably underlying engine in terms of meta-data and databasing?) in Axe-Edit and the HW to allow this kind of sorting. That is exactly the kind of feature creep I have to put shields up against every day!
In real-terms, the Axe FX III doesn't even have a sense of manufacturer. It has user-facing strings for the amp model name, and that is it.
"Okay cool. Add a meta-data system."
Which potentially leads to bloat, slows down amp model and channel loading because all of that information needs to be parsed when a model is instantiated, and breaks all of the gapless switching they've just spent a load of time building. Potentially anyway. Hard to say without knowing how the underlying engine and core allocation works.
I'd much prefer to solve that issue by running some user research and figuring out what people actually want - coz it might be that we're both entirely wrong in this.
But my ultimate point is, you can easily argue against your premise. From the perspective of "Oh shit, we can't use Manufacturer names in our models because we'll be sued into oblivion... okay... pseudo-ize them." ... from that perspective, the model naming scheme is already fairly consistent.
Consistency isn't the issue. Familiarity is.