an interesting point: "Who in their right mind thought that the Subtlety tree needed additional threat reduction? Even the rogue class as a whole?" Indeed, she points out multiple ways that rogues already have to get rid of all the threat they can possibly build up: Feint, improved Fein (via the Sleight of Hand talent), Anesthetic Poison -- not to mention Vanish! And now, in patch 2.3, the Shadowstep talent is set to give an extra 50% threat reduction on the next attack the rogue makes after using it. (This is on top of the change to make Shadowstep useable regardless of whether you are in stealth or not.)
But the 5000-gold question is: Why? As you can see, rogues are buffed up with threat-reduction options already. Is Blizzard blind to the actual needs of the rogue class? Bornakk shadowsteps into the thread to point out, basically, that we ought not to look a gift horse in the mouth: "Rogues with Shadowstep will probably be attacking mobs at some point and this will help them use the ability and not pull aggro."
The problem here, as I see it, is that players sometimes assume that devs are handing out some abilities and buffs at the expense of others. A player sees a reduction in threat gained after using Shadowstep, for example, and thinks that the devs are opting to put that in rather than look at the class's real problems and get around to fixing them. In reality, I believe, the devs take their time with the small changes, and wait and wait for the big ones; they do a lot of internal testing to make sure that they don't mess up the class even more by trying to apply a "fix" to whatever problem is presented to them. If there are going to be sweeping changes that revolutionize the class, they'll either come bit-by-bit, or else they'll coincide with the release of an expansion, which is really the only time when huge changes make sense.
Personally, I'm all for more threat reduction, but it's really not that big an issue for me. I'm more excited about being able to teleport about out of stealth as well as in. This and other changes coming up for rogues might actually make me go back to playing my rogue alt again.