I missed all the BlazBlue talk. :'( Reminder: never sleep ever again.
BB4 being announced like a week after we finally get CP extend was my breaking point, I feel. I didn't even get Extend, but I imported the vanilla Japanese version to play early (and lamented what they did to Nu, stance changes suck asssss). Bought the English version for cheap for the story, but never got around to it. I heard it was terrible anyway and they changed all the voice actors I like. 
I feel like I'd be interested in BB4 if they gave more characters visual redesigns like they did for Noel. There's only so many times I want to play as the same characters in the same stages with only like a single new move. Ragna would look x10000 better without that stupid jacket. Litchi and Tsubaki were evil now or some shit, but they still use the same outfits and color schemes.
I don't get why people are calling this new game "BlazBlue 4." It's just another in their never-ending series of updates that could easily be released as DLC instead of as new games (yes, even in arcades). We're still on BlazBlue "1" here.

And yeah, it is pretty nutty that they announced a new version already, although it is just an announcement and it's not like this is going to suddenly be released on the home platforms any time soon.
I think my favorite bit of fuckery from Arc is how every few games, they'll release new characters as DLC, and then the next version will have them in the game for free.

Runner-up would be them re-selling color packs each time, too.