That literally is just standard dev spiel that you get on any game ever developed. That's as much a "scam" as someone at E3 saying "I'm extremely proud of what our team have accomplished". In the gaming world it's one of the most generic sentences you can come out with.
Personally I'd say it was pretty clear even in Blizzcon it was never going to be a significant rollback to older iterations, just meeting halfway with returning some flavour from the old days. I agree that class design isn't where I'd like it to be, but then again I never had high expectations either.But well, he was basically advertising and hyping people over classes changes, and we saw minimal shit throughout Alpha/Beta. If anything, I was expecting them to do a MoP-esque rework, to bring us back to the golden era of class design, and I was even more hopeful of that since they decided to not make a new class. Turns out it was all lies and smokes. As always Blizzard. Instead of actually making classes fun, they focus on making a retarded system like covenants work. Actual idiots.