I would like to see either a minor change to Arcane Archer to include crossbow bolts or to see an equal enhancement in order to make returning bolts. For repeater builds the sturdy house D bolts (75%) just does not seem to help.
Or add the ability to take a stack of existing bolts/arrows and be able to make them returning (100%). Example, taking a stack of silver arrows/bolts and being able to use an enhancement to modify the arrow/bolts into returning silver arrow/bolts.