Okay, maybe I made the Step sound like it did other things? Not my intent but anyway...
I did some testing to see if doing Step after a successful Sweep is doable. I set the dummy to mash AB. So I tried it and what you have to do is do Two Steps and here's the weird thing. Sometimes D SAB will connect and sometimes it will whiff. I don't know the frame data after a quick roll, but that's just from testing shit out for 20 minutes. I assume after quick roll that they're free for such and such amount of frames. However, if I did s.D into SAB or cr.B into whatever it would land consistently.
Another weird thing I discovered is that sometimes, roughly 1 out of 5, if I do Step I sometimes get s.D instead. And this is me hitting B&D Macro so I don't know why that happens.