it's overpowered, shouldn't be banned, should get a nerf. don't like the unlock
it makes the medic skill ceiling higher (by not much), because it requires aim and movement prediction
it lowers the medic skill ceiling by big amount by reducing the skill of managing your team's health since you don't have to really think who you heal with your medigun you just shoot 3 arrows with the same effect and in fraction of the time
i healed the heavy for 500 hp with crossbow with the same level of aim medigun would require