My read on it: they're not saying NO, NEVER! because they never say NO, NEVER!, after all they reserve the right to change their minds. Like GC says, maybe some designer will come up with such a kickass idea they'll be like "fuck yes, let's do that" in the future. But they're not sold on it at the moment.
Similar non-committal response on DHs, just pointing out the design space concerns we're already aware of. Doesn't mean no, doesn't mean yes.
My guess is no new class next expansion, I don't think they like the balance issues of throwing new classes at the game all the time. The one after - maybe.
-Want talents to be meaningful, fun and sexy and not just +1% spell power anymore.
-Okay put cool powerful talents in the new trees.
-But wait if these talents are rotational DPS/major CDs there will always be one right choice for all situations -> cookie cutters.
-Okay we make most talent tiers non-DPS related, or DPS-situational.
-What does that leave? Mobility, CC, utility, heals.
-Sweet that works great for PVE.
-But guys doesn't adding all that mobility, CC, utility and heals have a serious effect on PVP?
-Shut up, PVP guy!
1.Blizzard has been working on remodeled vanilla models.
2. They've introduced a new race two expansions in a row, and frankly the lore on all three of them has been lacking.
3. Lack of any good racial candidates.
If there's not going to be new races, then we're more than likely going to get a new class. If its a new class, then its more than likely going to be the Tinker class.
Let's face it; Its the only class concept that not only has a history in the Warcraft universe, but it also doesn't overlap with any existing classes. Dragonsworn, Dark Rangers, Demon Hunter, and Battle Mage concepts all overlap with existing classes in spectacular fashion. Blizzard wants its classes to be as unique and different from one another as possible.
Most likely they would ignore the question or not give a huge broad answer like he did with DH answered it with a question. GC pretty much said it would be too silly depends on how it is put in game MAYBE someday one of the devs will come up with a epic development for it and they will be like oh fuck ya.
it was explained to you why Tinkers wont be next.
Also a huge issue is you seem to think your OPINION IS FACT