Cheese, while you're 100% correct that losing artistic integrity and creating solely for money is a pretty sad thing, you're really making a huge assumption that they aren't having fun making the games and that they don't want to. We shouldn't confuse our fatigue with the series for the developers'. What's our reason for thinking the series isn't fun for the developers anymore? They change the mechanics almost every game (the way bursts function, the addition of overdrive, they've flipped the switch on how Arakune's drive work like four times), and they add and retract moves form characters constantly. The series may not be as much fun as it once was for us but it's certainly not as stagnant as some games have gotten. It seems like the developers are still adding and shifting things around, still being creative within the confines of the franchise.
Then again, you may be right, they may only make this game to fund their true passion projects. I know I've been worn out on Blazblue since BBCP, But its presumptuous of us to assume that the people working their asses off to keep putting out content are doing it solely for the paycheck. They could get WAY less demanding jobs than game development if it was just for the money.