As I am reading this discussion here, it has moved me from long time lurker to actually posting.
It looks like the discussion is going back to emphasize hit. I have the basic understand on the current theory behind why hit is less important than it was, but after looking at the practice from my guild's (and other's) WWS, I am not convinced that hit has been dropped from the #1 priority stat. It may have lost its lead, but it is still mighty.
Much of this below is copied from a post in my guild's Rogue forum.
Here is the
WWS of my Guild's Tuesday attempt on Mount Hyjal.
<The Stormguard> are in WoW terms probably a mediocre raiding guild, but in the purgatory of our low population server (we took a free transfer), we are among Top 3 Alliance guilds (the top Guild is only a few bosses into Sunwell). However, when it comes to player skill, I would put our Rogues up against anyone.
I was assassination in Badge/low end MH/BT gear. One of the Rogues was combat in higher end BT/MH gear, and the other was assassination in mostly pvp gear (coming back from a long hiatus).
All my yellow damage averaged higher (except Envenom because I was more concerned about using it to refresh Slice and Dice than damage), yet I was second in swing damage. As swing damage is the highest contribution in any build, I was #2 on total DPS.
Looking at the WWS details, I missed with my swing a whopping 15% while our top rogue missed with only 2.6% of his attacks. I assume it has to do more with my lower hit value of 278 while he has not yet re-gemmed and was capped. Our crit rate being approximately the same, I think it shows that hit is still the mighty Rogue stat. On a side note, our dispellers were terrible without their addons so we had a lot more Banshee's cure than we should have.
The clincher I think is the third Rogue in PvP gear had a higher crit and significantly higher miss rate (27%), which is where you would expect a Rogue without hit to be.
In most of the other WWS's I have seen, the #1 Rogue is consistently the one who misses less with white damage. I realize that WWS has had issues, but I suspect that it doesn't have as much issue measuring white damage.
To sum it up, as white damage is still the single biggest source of damage for a Rogue, hit is still the single best way to boost this damage, keeping its crown as the most important statistic to stack for Rogues.