theres no reason for a titan to be able to melee you once and then get a free kill because the only thing you can do in a close quarters fight is melee back if you dont got special, and then proceeding to get all their health back because of knockout
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On one hand, ACD0 is annoying. On the other hand, you're coming to the forums with a PvP nerf demand that isn't directed at Hunters so it will get zero traction. Just play better. ACD0 is like having no Exotic if you're never in melee range. Treat him like every other player that shotgun rushes (which is almost all of them outside of Trials at this point).