Forgive me, but I'm not seeing where crit is better than haste even with the BiS T16 gear. Taking your troll BiS listing (which reforges TED mastery > haste instead of mastery > crit, as would be expected per stat priorities) and swapping that one crit gem for a haste one results in a DPS bump in SimC. Is it just in FD where crit > haste? I cannot for the life of me replicate your results in SimC.
Please don't eat me alive -- I recently switched from a mage and am new to hunter theorycrafting.
For hunters, there is no perfect stat that you can invest everything in and universally say this stat > that stat in all cases. Blizzard's changes or lack of changes to core hunter mechanics have resulted in mastery, haste, and crit synergizing well with each other and no one stat being completely dominant (this was slightly different in ToT because of RPPM mechanics and hunter RPPM trinkets when haste was much more powerful than the others). Additionally, we have shown, since MoP Beta, that pairing two stats together causes the most dps per point invested. Currently, at end of MoP, those two stats that pair together well are crit and haste. This means that small changes to crit or haste are likely to augment each other in different ways.
Similarly, there are points in your reforging where mastery will provide more dps than crit or haste. Your best bet is to simulate your gear in Simcraft or Femaledwarf.com. Simcraft and FD will disagree on final numbers, and you've seen that with your slight changes to the current FD BiS profiles. Part of this is due to the raid buffs that are defaults in SimC (banners, totems, etc.) However, you are on the right track by using SimC as it is the most accurate for modeling most hunter mechanics.
Crit >= haste > mastery is the recommended overall reforging strategy. In other words, your crit and haste are mostly identical in final investment (e.g. 14k crit and 12k haste), and as with all hunter stats, the two synergize and boost each other. Crit >= haste > mastery is also recommended due to the priority working well with SV and since Crit ~ Haste in most BM profiles, going Crit >= haste > mastery serves most hunters well in switching between SV and BM.
Haste >= crit > mastery will work better if you plan on using MM as your secondary, rather than SV.