My experience with them in online is this:
Clark now has a powerful tool, his step, with this you can surprise your oponent with footsies or grabs.
Versus a turtler Billy (or any turtler player), Clark is very good doing

+

and

+

like in KOF95, only calculate the distance and not be so obvious, also in the best online conditions is hard to react to this.
Benimaru has not a good defense like in 2002, I go near with steps and go short jumping +

, if you can, do a link with crouch

,

+

, etc... etc...

)
Takuma/Mr karate are a little obvious, when they jump, is 90% they will do

, for win this move, you need anticipate doing a large jump with

(some hard to do), but is safer doing crouching +
With all them try to do step in distance only for terrify, this have a psicological impact and average player will change his strategy to attack being more passive.