You think it would be in WOTC's best interest to attempt to accommodate more groups by "stretching out" the brand. For whatever reason, WOTC has decided
not to. It's either a smart move or a dumb move, but that's not the point to me.
I think that the brand was quite broad and has significantly narrowed in scope. I don't think 2e rules method of offering a myriad of disjointed rules that basically forced DMs to run their own game in their own style via households worked either. It was too much then, but spreading out to encompass more than a single style of play is a no-brainier from my perspective. Make more people happy with your brand?
Why does WOTC have to be the one who does it? They obviously don't want to. If you aren't getting what you want out of RPGs by going with WOTC, why go with them in the first place? There are dozens and dozens and dozens of RPG companies/projects out there who would love to have your money/attention. If you're willing to look, there's plenty of good material that would match your taste/preferences perfectly.
Not all groups are willing to try other games or other companies versions of the game and would rather just deal with the current version, even if they are unhappy with it. Often times things like brand loyalty are not as objective and rational as the hypothetical person you are talking about above. Remember it is a group dynamic at work here often it is not simply the game master saying, "I want to run game Y in lieu of game X" and the players saying, "Wow, thanks for running game Y". If good old game X is questions and the group all of a sudden wants to try game Y, Z, A, B, C they might simply say, "Screw it, too many choices, lets just go back to game X!"
Yet that doesn't stop people from wanting WOTC to do it anyway. It seems to me some people rather complain about WOTC instead of simply going to another company. It's basic free market theory that people will go to the places that serves them best. So what's up with some people not doing that?
It is also, market theory that informs us that tastes and preferences is only part of the equation.
The reason people want to
lobby WOTC instead of defect is because of D&D's name brand power. What people really want is the power of D&D brand name to attract people to their game table. If WOTC puts out a game that disagrees with a person, they have few good choices. Either they have to put up with a game they don't like or they must assemble/convince a group to play an RPG they never heard of before.
Of course I might be wrong.
This is precisely the the point. With their market majority they could very easily put out several rule sets in a line and not railroad their customers down a single play style - some begrudgingly so and others lovingly so. It is not like WoTC does not publish other games in their d20 line. Call them all D&D and make them easily convertible and you have something. Something special.
Oh and what is the advantage of having three games rather than one game with a myriad of "campaign option"? I think it is pretty clear:
support (official materials addressing each style)
ease of use (with only three options, its not like learning infinite options)
universal use of system ( go to a convention and play what you expect to play)