Yes we have some new changes to potential viable specs and they are all nerfs to prospective "sab-beater" specs.
Currently fast weapons are better than slow weapons, because whetstones add a flat amount of damage, so daggers get a much larger boost than, say, maces. Also, Spotter's Order benefits fast attacks and pet classes for basically the same reason - it adds a flat amount of damage to each attack, so the more attacks you have, the more DPS you will do. This all changes, come 1.4:
So with the new Spotter's Order, it will add a fixed amount of damage every 3 seconds, meaning it will be about 170 DPS for everyone in the raid, regardless of their spec.
With some specs, this will mean as much as a 300 DPS nerf, just from this change alone, but Sabdancer will not be greatly affected.
Combine this with the new whetstones now adding DPS to the weapons instead of a flat amount of damage, and daggers will not be any better than axes or maces.
Incidentally, the new Oilstone means that two-handers will be good for warriors once again. It's too early to tell if anything will beat paragon, but at least 2h specs won't be far behind.
The specs that will be greatly nerfed by these changes will be the Hoko Spec (because pets won't proc Spotter's) and the raiding bleed spec (Because Spotter's can only proc every 3 seconds).
For now, this will leave Sabdancer as the king of DPS mountain.
Also, if you're like me, you probably already use multiple pieces of PvP gear while raiding. Next patch, this will pay off big time, as the new PvP synergy crystals for rogue will add a nice smattering of attack power:
Rogue PvP Synergy Crystal
2-piece: +500 Health
4-piece: +200 Attack Power
This bonus is for Rank 7/8 gear, so we'll get a bit less, based on our current rank, but this will still put 4-piece PvP gear as best-in-slot until we start getting PvE synergy crystals out of HK. Glad I wasted all my DKP on stupid tanking weapons!
While this AP-boost will be nice, eventually we'll still want to use PvE synergy crystals in PvE and PvP. I'll take 30% increased Blazing Strike and 7 extra stacks of Scourge of Darkness over 200 AP any day.
Oh Trion, why can't you balance anything properly.