Perhaps an odd Suggestion but one that seems like it SHOULD be easy to implement. Right now when you use skills with a bow you get some flashy sparkly effects that go with the arrows.

However, when you do the same things with a Crossbow you get nothing. No animation of any sort. All that happens is the bow discharges and an arrow momentarily ends up sticking in the opponent. Which is odd because Crossbows shoot bolts not arrows which look different to begin with.