I like the weapon. Finally it makes sense, that a healer is a distance character with shooting healing injections. I like the idea, that the big bag must not be carried around. Just place it on the ground, look for your potions and shoot. Cool! ^o^ I want to play it.
Actually, Crossbow is just weapon. Mechanism, that looks like Eagle is Enchanter, that automaticly cast some light Spell to each Bolt (armor pierce, mana drain etc.) Nice Weapon for Fighters, that not so good at pure Combat, but often become Combatants.