Nerfing this in WvW will have a negative effect on the gameplay - this is way too heavy of a nerf without a suitable replacement on other classes - if you insist on going with this nerf, it will encourage boring, pirateship gameplay, driver pin sniping, and will just generally be bad for the game mode.
Please reconsider nerfing MoL in WvW - I don't see anyone in favor if this change, and several posts asking you not to. Removing this nerf is a slam dunk for the dev team to show they are actually listening to player feedback