I did a bit of testing on my enh shaman to see how dmg is affected by not being able to use sharpening stones. On the PTR I compared tooltips for my existing
https://ptr.wowhead.com/item=47508/aledars-battlestar&bonus=4136 (ilvl 109) and
https://ptr.wowhead.com/item=27901/blackout-truncheon&bonus=4091 (ilvl 103) vs 2 crafted
https://www.wowhead.com/item=41185/furious-saronite-beatstick (ilvl 100) with
https://ptr.wowhead.com/item=28421/adamantite-weightstone . I of course removed the agi/crit gems on my existing weapons for a fair comparison (well, replaced with int gems techncially). The results:
ability --> ilvl 109/103 combo --> ilvl 100 combo --> % increase
Stormstrike --> 1130 --> 1163 --> 2.92%
Rockbiter --> 373 --> 382 --> 2.41%
Lava Lash --> 436 --> 452 --> 3.67%
Lightning Bolt --> 910 --> 923 --> 1.42%
In conclusion, for a 79 enh shaman you would do about 2-3% more dmg if you farm your weapons of choice
prior to hitting 79, so they're ilvl 100 (or 99). Existing 79s - tough luck, there are no socketed craftable or quest reward weapons that are really worth using. Other melee dps specs will probably reach similar conclusions but I can't be bothered to check them
.