Nintendevil, it was tested a LOT. I'm telling you this, on many characters, an interior hitbox put them in a spin tumble in which if u literally watched it (try and SDI as much as you want, it was like bullet seed middle almost) you would be stuck for 5-10 hits before getting into a normal utilt to be combo'd. We are talking about a free 30% PRECOMBO in which the player could literally not even DI it and it was trivial to set up.
To add to my point, you should learn what each hitbox does, how much damage, KB and KBG it had and see why the numbers flat out showed why it was a problem (i.e. no BKB and very very small KBG sucking in and then the other direction).