If anything they should've changed colors to be dependant on spec. For example resto being green, enhance red, elemental blue, or something along thoose lines. So you can see ahead "Oh that's a elemental shaman cause his set is that colour" bla bla. Would've been nicer to have the different sets distinguished instead of just looking exacly alike.
T8 - Green (Ench Pants, Ele/Resto Robe)
T8.5 - Blue (Ench Pants, Ele/Resto Robe)
S6 - Red (Ench Pants, Ele/Resto Robe) (or S5/7? soz, don't pvp so have no clue on which season is coming up)