I don't believe we ever said we refuse to nerf Heroic dungeons. What we've been trying communicate is that it wasn't our plan to make sweeping nerfs to Heroics within the first month of the expansion's release. We will continue tuning dungeons, trash, boss encounters, and abilities. Some of those changes will involve nerfs. This act just shouldn't be misconstrued as us changing our minds, or a sign that we're unhappy with the general level of difficulty of all Heroics.
We don't think it was a mistake to start with the difficulty we did. We're happy overall with the progression path we have in Cataclysm. I think we've set an appropriate standard for this expansion, but we'll continue fine-tuning things (nerfs and buffs) to make sure the end game feels right as time passes.
Baradin Hold Access (Source Tol Barad Battle)
We don't have plans to allow both factions to access Baradin Hold, regardless of who controls Tol Barad. We do have some balance adjustments we'll be making to Tol Barad gameplay in patch 4.0.6 though. They just haven't been listed in the patch notes as of yet.
Demonic Empowerment / Turn Evil Bug (Source Demonic Empowerment and Turn Evil)
Thanks for the report, Yingyang. We're aware of it and looking into exactly what Demonic Empowerment should and should not counter. It feels a bit inconsistent right now.