The thing is, we don't want something new. We want something that we've been shown and told about for years. We want what dragons have been doing forever.
If we're stuck with something that looks human but with dragon scales and horns here and there, it's going to be super disappointing.
Highly doubtful. Again, the Tinker is a consistent presence in WoW. People have already seen Goblins and Gnomes running around in mech suits, so it wouldn't be a shock to them. Yeah, some would be disappointed by their inclusion, but it's highly doubtful that people would stop playing WoW because something ALREADY in the game is now available to players.
Think it would be cool if it was a Dragon Class+Race, but your alternate form could be any race since dragons get to choose how they appear? so basically perma worgen but u can transform into normal form of any race that you choose(you get dragon racials etc and probably must choose your alternate form on creation)