They need to make Shiradi Champion a PRIMAL destiny and get all the arcanes out of it. Have the spell procs for ONLY Primal spells and give it a bump in ranged power and melee power for unarmed and two weapon fighting. Shiradi is the worst designed epic destiny that does nothing for the Primal classes (barb, ranger, druid).
Next, the fix for ranged needs to be at the enhancement level, not the typical Band-Aid approach of boosting Epic Destinies. That is what lead up to this screwed up state as it is. While ED combinations can mask the inherent issues with classes, it doesn't fix the underlying issues and so the class balancing efforts will never be fixed until the foundations are fixed.
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For ranger, they need to address the weak enhancements. Make 10k stars for thrown weapons only, remove the double shot penalties from many shot and 10k stars, and address ranged power within the AA and Deepwood Trees. Until they do ALL of this, mucking around with EDs and adding ranged power there is just going to lead to more imbalance and thus never fix the real problems.