Knuckle type weapon Size Penalty

Was running around earlier with Iron Nails (Ignores DEF) equipped and realized I'm not losing any damage on medium and large monsters at all, with normal attacks or skills.
The size penalty for Knuckle type weapons should be
Small: 100%
Medium: 75%
Large: 50%
Source: http://irowiki.org/wiki/Size and 10 years of salt over Knuckles being useless aside from ASPD for Snap.
Tested with and without Weapon Perfection, the same damage throughout. I'm all for Knuckles being useful in Renewal but considering Iron Nails is a level 3 weapon that pierces DEF, that can get upwards of +100 Equipment ATK for a total of effectively 200 base ATK this is COMPLETELY RETARDED.
Weapon Size Penalty affects total Weapon ATK in Renewal which is pretty significant (not sure about Equipment ATK, seems like it on this server), anyone who has used Weapon Perfection on this server should know how big of a difference they make.
As it stands there is practically no reason to use any weapon over an Iron Fist, maybe not even for Asura Strike.