Yea, I got to agree; when I first played BB about 2 1/2 years ago, it was the hypest shit for me, but now it's just kind of become routine. It's why I latched onto other games like Persona 4 Arena, UNiEL, and Street Fighter(ironically), because they felt like a change of pace. When I eventually get bored of UNiEL and go back to BB, I'll probably have a little more appreciation for it.
But yea, some people are just excited for a Blazblue no matter what, while others have just kind gotten used to it. Only way I could see Mori completely giving BB a new spark is if he completely overhauled the system, and that might piss more people off than attract. But like you said, can't please everyone.