Diagonal hurricane kick reminds me of the heavy one from SF5, which goes high and hits quite a few times up close. Seen here at [5:12]
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I'm not sure if removing the hurricane kick would be a good idea for Gouki, considering his juggling hurricane kick has been a part of his gameplay for so long. Suppose it's gotta go, maybe it could be air-only? Some specials in KOFE have been like that before.