I played against EX Mai today. She can be very dangerous, going against her is quite hard if used correctly.
qcf+P: Fan throw, nothing special here.
qcb+K: Fan swipe. Comes out fast, has some lag but can be cancelled into qcb+P firefart. Decent anti-air.
qcb+P: Firefart. Can follow qcb+K.
hcf+K: Same as 98.
d,u+P/qcb+P in air: Head first attack, same as 98.
Two new moves:
qcf+K in air: Works like Andy's version, where she flies down diagonally, and when she lands you have two followups.
P: No special properties.
d,u+K: Spinning fier Mais. Basically, Mai will stand up straight and do some ninjitsu thingy, and two Mai shadows on fier appear afterwards, covering her front and back (on a 2D plane of course). Comes out pretty fast, and recovers fast enough that you can't punish her easily. Obviously, anybody touching the fire will get hit, and I think this move uses up around 2/5ths of the stage (and really close to using up half of the stage). From my experiences, once she gets away from a distance, this move is practically invincible, unless you hit her first (there's still a bit of time). If it's blocked and you're inside her 'range,' she'll do a few extra hits for tick damage. Hugely annoying move. Never tried a projectile against it however.
qcb,hcf+K: Fiery ninja bees, except Mai flies diagonally upwards instead.
qcfx2+P: Not too sure what this is...think you can hold this move.