Yes there is a strict time frame. If off by even a frame it won't work or the force tech will whiff. As soon as you do P you have to free cancel and buffer in the 214P:pause:P
I personally like them all except I do really think Hitomi's and Momiji's are boring. Momiji's definitely would look better to me if she had her hair down. Or at least a low ponytail.
The only way I can see it being a bra is if they modified the outfit (like they did with the feathers) and gave her a light tan strapless leotard. Either way, We won't know until it's released, and if it's Lisa then it is if not then not. Either way I like it.