Air Options: You can only double jump, teleport etc. so many times before touching the ground again.
BURST: Fills over time and, as of 0.3.0, it also fills a little when you get hit. Used for Burst (100%) and for Whiff Cancel (50%).
Just realized whiff cancel uses burst meter, thanks for this knowledge
Yeah... Burst meter and air actions consumption are not showed in the preview. So it is easy to miss...