WOW Gold haste and spell damage on every honor piece

Casters sure complain a lot about melee itemization about wow gold, but they get to choose between crit,WOW Gold Buying,

haste and spell damage on every honor piece! Why can not we at the very least get to choose between armor.

and a big reason why PVE geared rogues still have a big advantage against pure PVP equivalents. Why can not Blizzard release a separate set of rogue arena gear with armor penetration ratings instead of crits?