That weakness is nothing, what's 5%? If they're melee and they do it then you can reflect them for more damage.
But I'm totally fine with that. What I want to be "fixed" is Avian giving +10% more HP rather than 5%. Yes, they give 10%. I have the same HP with Peco Peco Wings as with an Avian Wing, then more cause I carded it with an OH for my Paladin.
That just made it better than Sacred for the intended elemental reduction, since from an Asura test, Asura did 20k more damage on my Paladin with minimal reductions, but the Avian Wing alone gave 25k more HP. Really, look at the part where you reflect 15% damage with the wing, if they use the opposite element, you take in 5% more damage, then more reflect, that's fine. But then you have 10% more HP. Doesn't that make it better than a RAW too?
EDIT: Oh, and don't get me wrong, I have Avian Wings. But I do also have those ladder prizes that are supposedly hard to get, and get matched up with something worth $20.