OK, I just discovered something in CS2 that is character specific that would probably become universal in CSEX:
It is possible to do 5B>5C>j.c.>jC>delay jD>land 5A >combo on tall characters like Valk, Litchi, Tager, Haku etc. in CS2. It's pretty hard to get consistently, and will probably never work in netplay. It *just* doesn't work on the medium sized characters like Noel, Lambda, Jin etc, the jC sword animation can be seen to just brush the tip of their head but it doesn't hit.
Now, we know that jC's vertical hitbox became fatter downwards (i.e. larger hitbox below the sword animation), so it'd work on most of the cast except for Carl and Plat. And it'd probably become stronger since a) the damage off of 5B and 5C increased b) jD probably got a level increase (since it has more untech time), so we can do jD land 5B instead of jD land 5A, saving the combo from unnecessary proration.