I can't see it working on an ordinary player.
When you enter Jatetsu you have 3 options.
Overhead, Low, Anti-Air.
If the opponent leaps in at you when you're in that stance they deserve the fatal counter.
Unfortunately a good player will not jump on Hazama when he's in a potential anti-air stance unless they're really fucking stupid. Chances are they'll force you to either drop the stance with a projectile, or hit you with a good poke so they get CH.
imo, 214D#B is a really bad option for an anti-air unless the opponent charges in while you're already in the active stance.