Well, I don’t have much knowledge about arcade sticks. One time I bought the cheapest one I could find, as it was my first time to play on such device – it is “Lioncast Retro Arcade Stick (10159)”. Good for PC, but not for PS3, as some buttons need to be pushed harder, almost like something is not connected right. Compatible with PC, PS2, and PS3, so yeah, it must be old.
I’m sure there will be continuation in the future, I can’t see a reason why not. Also, Mori posted two new Murakumo Units on his Twitter, they can be seen here – they surely look like BlazBlue related.