So I've been playing around with FD and ShadowCraft for rogues both making a max gear character (T16 HCWF+8) the settings were the full set of buffs and debuffs pre-pot and combat pot, no tricks, stormlash or warrior banner and Single Target only.
The results for a BM and SV hunter were(not counting MM because t16 set bonus is a bit wonky on FD):
BM 352.5k dps
SV 349.2k dps
The results for all rogue specs were:
Assasinaion 400.9k dps
Combat 370.5k dps
Subtlety 383.2k dps
You do have to enable ptr changes on FD, but it's also interesting to see that if they didn't change anything we would be even further behind in maxed gear 342k for BM and 320k for SV. So I guess we do kind have to thank blizz..(and you cant do it in shadowcraft since you can't access ptr gear :l)
I'm not sure how to link ShadowCraft sets but in all honesty its a lot faster to use than FD is (no offence) and you can find a max simmed gear set by going through each piece twice clicking which ever is on top and clicking auto reforge and re-gem once or twice.
But yeah so the lowest rogue dps spec is about 20k above us and top rogue spec seems to be nearly 50k above. Also I'm no rogue expert so it could be that Assas and sub are totally unplayable but 20k damage difference at max gear is still a lot. I can imagine that mages/locks maybe even boomkins might be even further ahead( I don't know of any online based sim sites for these classes)