I'm conflicted when it comes to the Javelin not being able to lock through walls. One one hand I agree that it is just... insane. However it does give it actual synergy with the dart pistol, which will now be nerfed to hell and back.
I'd agree to change the way it works now and need a LOS, IF they make the javelin work the way it does irl. Let us have the choice between top-down and direct attack modes, while at the same time NOT nerfing the damage and keeping it as is, since they've taken to nerfing gadgets all of a sudden.