Just wanted to chime in now that I've had the 3.2 revision on hand for a few days. The hump around 200Hz-1KHz seems to have been smoothed out, which I am quite enjoying. They sound less "dry" than before, which I had mentioned a few times in the past. I'm thinking that's probably due to the reduction in that area...? I can't say for sure, but the treble also seems smoother as well. So, overall, they sound smoother and more natural...whatever that might mean.
Though, yes, I would have preferred this right off the bat when I first purchased the Mad Dog, I'm really satisfied with how they sound right now and don't mind the additional $30 fee so much. I think anyone jumping on board right now is getting a pretty good deal for $300.