Sure, but the real question is that if WoTC decided to open playtest such a class that would be in addition to today's classes would you stand aside and let people that want this in their game design it, or would you threaten to light your self on fire in front of HQ unless your parameters of martial were adhered to in the new class?
LOL nothing so drastic, I just wouldn't play it.
I didn't really care much for 3E when it came out, so I continued to play AD&D for over a decade longer before I took a break. I met some people playing Pathfinder, looked it over and said no to that as well. I only got into 5E because the people who wanted to play D&D had the new edition, so I went with that (as none of them had ever played a prior edition). At this point, they are all heavily invested in 5E, so reluctantly I keep playing it because it is still better than no game at all.
But, as you know, I house-rule, homebrew the sh!t out of it because I am not happy with it over all.
So, if 6E comes out and they have
ultra-super-uber-awesome stuff that is way over the top for my style, I won't play that, either.
However, given the different directions the game seems to go, I don't think one game can have it all and still be D&D to everyone. Just won't happen. From my poll (as small as it was), I think the best solution is to expand the game to a full 30 levels, and offer overlap between styles so mundane/action-hero is levels 1-20, heroic/Xena is levels 6-25, and super-heoric/Marvel is levels 11-30. I can see my games then easily going to level 20, and someone who wanted a super-hero from session 1 just starts at level 11-15 or so.
In short, they
will lose a customer, but if they gain
two because they are making what people actually want to play, I certainly won't begrudge them or the people who play the new edition. If it is a lose one, but only gain one, then yeah, kind of annoyed because they could improve the game I enjoy without alienating me. It is the concept of keeping a customer satisfied or getting a new customer and losing the old one, which frankly always ticked me off when any company places more value on a new customer than an old one.