I agree that low attacks may be important but don’t get the wrong ideas about people not wanting to crouch low against Ibuki, because her low game may not be as effective or whatever.
For one people are not going to just stand block against you because inviting that cr lk into combo is just way to stupid and obvious. I main Vega and his only viable low attack starts at 8 frames, yet still no one is stupid enough to not crouch, because inviting that low attack is just dumb. As a matter of fact I believe that if you do cr lk -> lk tsumiji on a standing opponent fairly close, that you can easily get the standing jab into st mk into w/e ender. This will surely deter standing on wakeup, if you get hit by that combo once.
Also not crouching against Ibuki also gives her better range on her TCs and her standing jabs which is also bad for the other player. Crouching against her is good.
Also there are FOUR character where the second hit of TC4 WILL NOT hit the character if they are crouching even if you are as close as possible. These four are Guy, Viper, Blanka, and Rose.
On certain characters if you are at certain distances away the second hit will also MISS if they are crouching. I have made a list of this if you guys want it.