Why is Onslaught a one hit WS

Ok since I'm not sure how to add videos on the forum or if it's possible for us here is the link for the Relic WS Onslaught and below is the link for Rampage. My question for the Dev team is if both ws's show the same 5 hit motion why is the Relic WS gimped down to 1-hit.

Now I bring this up because while there aren't a ton of Guttler's out there it would be a simple fix to this underpowered ws to make it at least equal to Rampage.

Onslaught
http://www.youtube.com/watch?v=ZyI5f6i7oU4

Rampage
http://www.youtube.com/watch?v=dhJBK3ti_3w

Because all the relic Ws's are 1 hit ws's. Because at the time everyone subbed THF and SATA'd a strong 1 hit WS, and if you couldn't do so, you were terrible. It wasn't until sushi and easily obtained acc gear was added by the truck load that anyone ever landed more then 1-2 hits of multihit ws's.

Actually, dont discount Onslaught at 95 it generally outpreforms rampage outside of abyssea.
inside Rampage still wins easily tho.