With the new KMS updates

There's a 0.3 second delay from when you stop Rapid Fire to when you can start it up again. So yes... in a way he's right.

With Demolition, you're still vulnerable during the time you have to stand still, though. And then you get KBed and have to reposition yourself.

Rephrase? I never found rapid walking to be very hard. I can do it without losing very much speed compared to normally walking. o_o