Sinister Calling and Squashling pet low droprate
I understand completely that people want to get the achievement, the title, and the mount, and therefore the concept of an achievement that may be intended to be uncommon is not a popular one. I wish everyone the best of luck; while I realize I may have frustrated you today with my answers, but I simply wanted it known that everything brought forth as a concern regarding the Sinister Calling achievement was discussed and the achievement was judged reasonable. We'd read the feedback and we understand where you're coming from but the achievement is still right about where we want it to be in terms of being able to complete it.
That isn't to say we won't make tweaks to the availability of the items in question, but chance will still play a part if we do. We have no intent of making the items use a quest, token, or other guaranteed system to achieve.
Rogue
ETA on Shadow Dance fix
The bar-changing will be after Nov 13 and Lich King ships. The change to the cooldown on the openers should be in now on beta and very soon on live.
Fan of Knives and single-target DPS
We'd love to get rogue AE higher if we can do it where Fan is only used for AE and not as a general part of the single-target rotation. Also note that comparing anyone to a Ret paladin recently, and especially at 70, isn't going to be a great comparison. Elemental isn't designed to have an advantage over mage single-target dps, but rogues should have an advantage over warrior single-target dps.
Combat Potency changes and Fan of Knives
So it turns out the Combat Potency change to nerf Shiv also keeps Fan of Knives from generating Energy. Making the cooldown zero might do weird things to PvP when a rogue stands there and throws out knives to attempt break stealth. But we can probably lower it to 10 sec or so. That's Thunderclap / Whirlwind range.
Hemorrhage
But the charges are the entire point. Hemo is supposed to be a debuff, not an alternative to Sinister Strike. It in fact yields better damage per energy than Sinister Strike untalented and it's only the talents that prop up the latter ability. Adding more Hemo talents just gives you another high dps, spammable attack.
It is true that the rogue personally may not benefit a lot from Hemo when the charges get used up correctly.