What I propose is simple, and will fix a wide array of issues from itemization, EDs, and enhancements=
Make any item/feat/epic destiny/enhancement/action boost that gives Double Strike, to also give Double Shot.
Quick and easy and helps eliminate confusion. I see you have allready done this with some items, such as "flurry" armor on the AH that gives both double strike/shot. Just make this a uninform change please. =)