With the new way stats now work in PvP, the stats on gear don't matter, but weapon speed still does! and these weapons can be used at any level.
Rogues/Shamans/Monks/Death Knights/Warriors/Demon Hunters will get MUCH larger hits and crits with their spell attacks using one of these two weapons in their main hand weapon slot:
Draconic Femur - Item - World of Warcraft
Common Legion Blade - Item - World of Warcraft
due to how damage is calculated for your spell attacks (not auto attacks) these weapons increase your damage output because their swing speed is an insane 5.0 seconds, almost DOUBLE normal melee weapons. With how PvP stats now come from templates instead of gear, these weapons being grey isn't a dps loss.
Both of these items also have ilvl 100, and can be used a level 1 so with the new system ilvl has a small impact on your stats in pvp, at low levels 100ilvl will have a huge impact on your stats for pvper under level 50.