Got my shipment today. The fit is not as bad as i thought from all the reports. The clamp or lack thereof is the exactly the same as with the W1000x i also got. You can't headbang with these but the good thing is that my ears don't touch the drivers as they did with the old AD2000. Both headphones disappear after wearing for some minutes. The AD2000x has a tendency to slide down when you move whereas the W1000x is more stable due to the pleather pads giving a bit of friction. That being said i'm perfectly fine with the fit.
Soundwise these are as bass light as the original AD2000, kinda reminds me of the dry W3000ANV bass. I like that these have more treble and air to them and deliver a tiny bit more neutral presentation while still being a mid-centric headphone overall.