The Air no longer has a true purpose other than driving upsells
It should be called the "iPad TCS" (Tim Cook Special)
I couldn't disagree much more, I think.
The current lineup - base iPad, iPad Air, iPad Pro - makes sense. Standard, better, even better/luxury.
Especially now that there's a 12" iPad Air because previously, the 12" Pro was
really driving the upsells.
A base iPad is great and I love mine, but overall, the Air has a couple of features that make me prefer it - laminated display, Apple Pencil 2 support, the overall performance, the Magic Keyboard, display zoom options.
The iPad Pro has a lot of features I don't want or need, plus I can't justify the cost - so: iPad Air.
The naming (considering the iPad Pro is now lighter than the Air), however, does not make sense and as others have said, it should probably be something like iPad, iPad Plus, iPad Pro.