While I think there is validity to nerfing swiftbow and Volley. The nerfs targeting the wrong aspects of the weapons. They are both primarily anti-infantry weapons. They just suck at that role on live. We are now back to the same issue in the beta.
What should have happened is Volley should have had its ammo nerfed while Swiftbow should have had it’s armor damage lowered. Now they are both abyssmal in comparison to other horde clear options and abysmal at sniping in comparison to sniping options, rendering each weapon a very sub-par pick. This is not good for build variety or the balance of weapons, generally. Please see the video for horde clear timings. Note that I tried to skew the test in favor of Volley and Swiftbow. Enemies in a perfectly straight line are where they should really shine. Further, reports of S-bow and Volley Xbow horde clear being too strong were clearly overblown in comparison to the horde clearing capabilities of other ranged careers.
Time results for 10 fanatics and 10 Marauders on Cata:
Blunder: 1.5 Seconds
Grudge: 1 Second
Fireball: 4 Seconds
Swiftbow: 9 seconds
Volley: 9 Seconds