Im not at liberty to discuss fox, and pretty much any talk of consistency and balance falls apart when he's brought up.You're not wrong, but...
Have the techroll lengths of every character been thought out that way? Is there a reason any given character has any given techroll animation?
I like to discuss the game in a way that disregards him in the equation since it's pretty much agreed upon that his kit as a whole is a problem.
To elaborate on Squirtle's teching situation though, you can almost see him as having a "shine on getup" type of option. Between dtilt, ftilt, and jab (hell, even utilt at times) he has plenty of incredibly fast options that your opponent simply can't react to.
It seems awful when its narrowed to mixup between tech in place or tech roll into another roll or shield, but when the mixup broadens to include tech in place > grab/attack, tech roll > grab/attack, tech in place > shield/roll/retreat, and tech roll > shield/roll/retreat then squirtle begins to create his own opportunities for escape.
BEING REAL THOUGH?!?!?!? just never tech and slide off the stage every time you get hit instead. 10/10 never fails ever to anything