Crit is Enhancement's worst stat for sure and you don't want to prioritise it, however saying that it is worthless is over exaggerating it.
Enhancement doesn't
have any bad stats, we scale pretty well with basically anything that can turn up on gear. Optimally. you want haste/mastery in every slot but realistically crit is usually worth 70-80% of the value of your other stats on live right now. It's already usually an upgrade to equip any item with +15 iLvls regardless of stats, might be that after the PTR is pushed this drops to +10.
Also @
Klatar the only things not buffed by the aura are Hailstorm (already nerfed so it's not going to be 16% of your damage anyway), Unleash Doom, Doom Vortex, and Feral Spirits.
If those skills combined are 40% of your damage then I hate to say it but you are doing something wrong