I thought the GH:WoR spin was YOUR job?
But really, the spin is obvious (and entirely true): this stuff may be great to grab press and create buzz, and the new features will hopefully work properly and be fun, but the (potential) millions that determine whether the game is going to be a success or not play Medium Guitar and aren't gonna give a shit about a $200 realtar or a mini-keyboard; it's entirely possible, if not likely, that the amped-up "more" of traditional gameplay GH6 is (one would hope) providing will be better for them and more to their tastes.
I mean, you can't rule out the possibility of it becoming a fad (seriously, a Pet Rock??), but I remember the hyperbole surrounding HMX's announcement of Beatles, and we saw how badly that did compared to those expectations.