Weapon costumes are affecting the range of our attacks. It's been that way for a while but as a PvM Player it wasn't much of a bother. However for PvP consideration this should be fixed as it paces some people in dangerous situations that they can't see on their screen.
On the client side, you see yourself at full range, server side + enemy-side, they see you at the weapon range. This is bothersome and exploitable.
By having a short range weapon in your EQ and Larger Range costume weapon, you can bypass shorter ranged weapons.
Having a long range weapon in your EQ, but a shorter ranged weapon in costume, you're losing that range.