Why don't half elves have some weapon enhancements? I really thought that they would have been able to take elven weapon enhancements OR human versatility but instead stuck with just human versatility.

Alternatively, could half elves be given their own unique set of melee weapon enhancements separate to valenar or aerenal?

Either way, they should be able to take elf ranged weapon enhancements as it is silly to let them take arcane archer enhancements but deny them the weapon enhancements which go along with it.