if u got haste from pve offsets and trinket, them u are good. it isnt a good idea to get haste with gems.
i havent tried stacking haste for pvp. im sure ur dps will be weaker, but ur survivability will increase. against warr, rogue and hunters, thats a bad idea cuz they reduce healz.
i suggest u get haste from off sets and Herkuml War Token
and no, trying different things doesnt mean u are a jerk.