MM and Survival is abit different stat wise.
MM = Agility > 8% Ranged Hit > Crit => Haste => Mastery
Survival = Agility > 8% Ranged Hit > Haste => Crit > Mastery = Haste
If your item level is below 378 and your not sufficiently hasted i.e below 20% you will find yourself low on the DPS meter.
I assume that you are poorly geared as my hunter has an equipped ilvl of 369 total of 373 and i pull off 22k dps in LFR.
If you take a look at the stats again, you shouldnt reforge away crit or hit to make your Haste increase. This is why you need high enough item level.
I suggest you read up on some theory crafts, preferably @ Elitist Jerks, get your spec and stats right if not to mention glyphs, enchants and gems.
I've personally tested out this CC on two hunters in LFR/HC and Dummy, and can with good conscious tell you that I know this CC works up to its full potential and will do great DPS.
If you comment back that you've already done this and that and its still low, i can only call you a liar