It's no surprise that Young Wolf's Howl is a severely underwhelming weapon, between its low damage output and high ammo consumption. My simple suggestion to bring it in line with the other exotic swords is to incorporate the same ammo-regeneration mechanic of the axes. Maybe each attack uses 1 ammo, and each time you get a hit you get 1-2 back. That would alleviate the ammo issue and make the weapon, at the very least, fun to use.
Too OP? Still a waste of exotic space? Perfect? Let me know what you guys think
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Well hitting enemies with the wolfs howl gives you and your teammates a damage buff on the enemy. That's kind of the point of it.