Footsies aside, which the corner gives Ninjutsu a massive advantage to as Eddy Said, his Hellfire variation has great corner pressure but Ninjutsu gets shades of it, with the stagger. I think Eddy touched on this but didn't go into detail so I will, and while it's obviously not going to be as good as Hellfire's RC pressure, you can get good mileage off 21 alone staggered into another 21, or B12, or just finishing the string, it's not A-List pressure by any means but it IS a very serviceable pressure mix-up that most characters don't have access to. Midscreen connecting the last hit of 214 would end your pressure and oki if they tech roll, and a blocked 214 would have pushback out of follow up 21/B12 range but not to a far enough range for F2 or B2 (good range for B4 tho, but thats midscreen). Use this stagger to bait armour and get a full combo corner punish, or just disrespect them with 21 stagger conditioning to connect a B12 hitconfirmed into chain combo if they try poke out but havent got the timing precise (nobody has) or just hit em 214 which also leaves you plus if they block but doesn't push you back too far cause corner, and knocks em down on hit if they try to poke out (gap only gets beaten by armour) and doesn't let them tech roll out of oki, gives you time to space yourself and threaten an F2 against armour. Obviously this stagger is good midscreen too, it's just even better in the corner for the reasons that Eddy mentioned