All I want to see is:

Refulgent Arrow either to give +10% Critical Strike Chance and replace Straighter Shot completely upon proc
or
Straighter Shot, as a trait, is replaced by Refulgent Arrow, meaning that maintaining Straight Shot during a proc no longer wastes Refulgent Arrow. There is no longer a Straighter Shot after RA's acquisition.

As for RA, a proc, being too desirable vs. the more consistent Empyreal Arrow, I'd simply suggest that the "Additional effects added only once" clause on Barrage be removed. This would make Barrage-EA viable at low Repertoire on Army's Paean and Wanderer's Minuet.