ok, so class exclusive feats.
No.
Seriously, this is not that hard to understand. "Class exclusive feats" are still feats.
But sure, why don't we call them, "class exclusive feats, that are gated by level and choice of a subclass and must be taken at that level," which, you know, are exactly what subclass abilities are.
In the same way that we call "class exclusive feats, that are gated by level and choice of class and must be taken at that level" ... class abilities.
Which is why we don't call them feats, because feats are not class (or subclass) abilities. Other than that, though, batting 1.000!