I must be doing something wrong. I'm trying to use the simulator. I have two rogue weapons because nothing more shammy-like has dropped for me yet and their DPS was vastly better than my blue weapons. So, with simulation I found I got better DPS with FT on both and it out does my DPS using my 130 dps weapon MH with WF (in the simulation).
So today I was playing and plugged in the values for Calamity's Grasp and Angry Dread, using WF/FT. It's about the same as the numbers I was getting on my two daggers with FT/FT. Here's my armory:
Me with two knives
Am I doing something wrong in the simulator or is this just the way it is with WF and FT these days? Also, the calculated DPS is quite a lot lower than I'm actually doing on Patchwerk. I'm doing 3900ish on him and the simulator has me around 3067. I know I'm not perfect on my rotation and I forget to refresh Magma totem sometimes, so I know I can do even better.
Here's my config file with the knives. I just changed weapon speed and DPS for the slow weapon tests (didn't bother to fuss with all the stats it'd change figuring it'd be minor). Oh yes, I changed over to Windfury glyph from Flametongue too.
Thanks for your help.

race draenei
mh_speed 1.8
oh_speed 1.5
mh_dps 171.1
oh_dps 156.7
mh_crit 24.81
oh_crit 24.81
mh_hit 12.08
oh_hit 12.08
mh_expertise_rating 181
oh_expertise_rating 181
ap 3238
haste 7.41
armor_penetration 0
str 121
agi 763
int 433
spi 145
spellpower 1486
spell_crit 17.53
spell_hit 15.1
max_mana 10611
mp5 0
mh_imbue flametongue
oh_imbue flametongue
mh_enchant -
oh_enchant mongoose
mh_weapon -
oh_weapon -
trinket1 mirror_of_truth
trinket2 sphere_of_red_dragons_blood
totem totem_of_dueling
set_bonus -
metagem relentless_earthstorm_diamond
glyph_major1 lightning_shield
glyph_major2 flametongue_weapon
glyph_major3 stormstrike
ancestral_knowledge 3/5
improved_shields 0/3
mental_dexterity 3/3
shamanistic_focus 1/1
flurry 5/5
elemental_weapons 3/3
unleashed_rage 5/5
weapon_mastery 3/3
dual_wield_specialization 3/3
mental_quickness 3/3
improved_stormstrike 2/2
static_shock 3/3
maelstrom_weapon 5/5
convection 0/5
concussion 5/5
call_of_flame 2/3
elemental_devastation 3/3
reverberation 0/5
elemental_focus 1/1
elemental_fury 5/5
call_of_thunder 0/1
unrelenting_storm 0/3
elemental_precision 0/3
lightning_mastery 0/5
elemental_oath 0/2
lightning_overload 0/5
lava_flows 0/3
storm_earth_and_fire 0/3
shamanism 0/5