The problem I've always had with the Elven weapon proficiencies is that they are useless to classes that already are proficient with those weapons. The least they could do is give a +1 bonus to hit with them or something. And then, on top of that, they gave them the ridiculous, annoying to keep track of and easily forgotten +1 Perception "aura." I can't say I'm very happy with the Elven racial traits this edition.
*sigh*