The issue, I think is that everyone in the thread felt that a new SaGa was a foregone conclusion, and it turned out not to be. I imagine they'd have been almost as disappointed if it had been say, Grandia 4, but that it's at least in name Another Damned Final Fantasy Offshoot has made the letdown a bit more bitter.
The project doesn't offend me nearly as much, but the FF3DS engine has only gotten worse with time and I hope S-E puts in effort to speed it up, at least.
The only S-E project that really has my dander up is the Front Mission third-person shooter coming to 360, but that's a topic for another thread altogether.