Well, the issue dosen't lie in "nerfing" weapons or not, but rather the silly limitation in choices.
Two quest rewards (Dargun and Graystone) are two-handed only, whereas all other classes who has the choices in one-handers or two-handers gets to choose, and apperently this third offers yet another two-hander (not sure what other classes gets for rewards, or even if they get a choice.
Introducing fists (which you could then have two off!) of one of variations as a reward on these would hardly be gamebreaking, making completeing either one (you can pick a two-hander and get a good return) or several (you can get a nice dualwield package) as choices instead of getting an ever growing compilation of two-handers regardless.
In particularly seeing that God-King fists now would outdo a one-handed fistwrap from Graystone (it's ~61 DPS now compared to the ~56 of a graystone onehander, stats might make the latter better choice still though) I don't see why the quest rewards are so limiting.

99.9% of all our dropped/quested weapons are Mnk/Dsc..most leaning toward the Dsc side for stats..(vit, energy, etc)
  We should at least have 2 sets of weapon choices with quests that reward them, one with str/dex/con/hp etc.for Monks,and one with wis/vit/energy etc. for Dsc's (they can even label the 2 types of weapons Mnk/Dsc if it makes em happy). Thing is, Dsc's can use any stat that's on a weapon, Monks can't.

 I I got extremely lucky and got a chance to run this quest with Fujitu's rogue alt a few weeks back.  Thankfully a 50 bard provided all the dull shards so I didn't have to do any farming(Though I had previously farmed 2 dull shards).  Had a bit of trouble with Shrine of the Tempest but lucked out and a GM responded in miraculously less than a minute.  All and all that was a pretty good day since  I upgraded my shuriken orb to legendary right before I joined up with that group.

   So far all the way to lvl 45, Stormslam has served my lillte drunkard well as a dps weapon while I was grouping.  I've actually gotten quite a few positive comments about my dps from groupmates.  Only 3 more levels to go till it goes into semiretirement and I swap it out for the fancy new flawess pariah's powered bstaff of devastation a guildie made for me.