I’ve found pure haste stacking ret is very good for survival in Wpvp situations. If I get them in a full stun lock I can spam like 4-5 flash heals for nearly full health, and by the time stun is back up, because of mana regen from having so much haste, I can do it again. Currently I’m prot but would like to switch to ret once I get my hammer. Almost exalted and still no eye. ><
If you are going Haste, do not go ES. The point of Haste is to have a smooth and faster Zeal->TV uptime instead of the small windows where you have nothing to do when you go more Crit style.