Of course it's still there. No one's arguing otherwise. Yes, fret buzz can be alleviated with EQ, just as it can be accentuated with it, hence my point.
It's an elementary syllogism: If fret buzz can be accentuated with a high end boost via EQ, which it can, and if some of the amp models in the Axe-FX III have more high end than the II, which they do, then it logically follows that some of the amp models in the Axe-FX III could potentially contribute to accentuating fret buzz.
Am I suggesting I know for a fact that's the case here? No.
Am I suggesting it's a very real possibility? Yes.
Again, I'd like to hear a sample, but the OP seems to be MIA.