Time will tell, but I just don't buy it. If by "ton" you mean a thousand people, then yeah I agree. But that is still tiny. The western Miku fanbase will remain niche until she can sing English, and the fanbase that will buy this game is even tinier.
Basically I do not believe there is an army of high school kids champing at the bit to spend money on a game like this. Maybe it will be worth Sega's while, and if it means we get a sequel to Diva f later this year I'm all for it. I'd just prefer to see a new Miku game announced than a localization of last year's model.
I dunno, there sure was a lot of excitement when they initially put up that Facebook banner asking for likes. How many of those likes become sales remains to be seen, but I don't think you can just write off an entire demographic without testing the waters.
Also, this isn't "last year's model" technically; DIVA F (PS3) came out in Japan on March of this year. It remains the newest game of the series and due to Sega sticking to significant dates when releasing new games (usually around Miku no Hi, 3/9, or Miku's birthday, 8/31) we can pretty much assume a new Project DIVA won't be coming out this year as we would have heard of it by now. Project mirai 2 is this year's August release.
Does it? 30 fps with framerate problems would be disappointing. :/
The issue most people had was that it was 30fps in the first place, but that 30fps is fairly consistent. Still jarring if you're used to the 60fps Dreamy Theater engine though.