Similar to how the Nightblade ability "haste" was totally scrapped and reworked due to attack speed not being useful because of animation canceling, weighted is in the exact same boat. This weapon trait has not been improved, and will seldomly be used.
Considering 1.6 is a major balance update, I think this issue needs to be addressed before it goes live. The trait needs to be competitive with sharpened and precise. I think a quick and simple fix it would be to have it "increase critical damage". That way you can choose whether you want more armor/spell pen with sharpened, more crit chance with precise, or harder hitting crits with weighted. Ofcourse the numbers will have to be tested and balanced. Thanks and looking forward to 1.6
Ali Dreadsabre -Necromancer
Ali Sabre -Nightblade