I appreciate that you want to make a Feral PvP thread because I've been looking forward to one. However, I suggest you use markup in your post to make it less of a wall of text.
Now for some criticism (don't take this too personal):
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DK (full DPS spec) - These's guys hit pretty hard. Luckily they don't heal for much (even blood) and you CAN out damage them. I usually fight them just like warriors.
If he's in full DPS spec then I'm guessing he's got some PvP gear as well. He might not heal as much as one in tank gear (since DK heals are based on health values), but he'll not take the same amount of damage either. And as a Blood DK I had more ways to heal myself than any other DPS class I know off, save a Priest or Druid out of their forms. Mark of Blood, Bloodworms, Death Strike, Blood Presence, Rune Tap. It really gets silly at some point.
Conclusion (based on personal experience): Beware the stare of a Blood Death Knight. They hurt and they are tough as hell to kill.
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Rogue - Just die and get it over with. They're like a feral druid, but much better. Stun, stun, blind, stun. No use.
Just die? What? Why would I just die and get it over with when I can kill him much faster?
I dueled a Rogue in PvP gear while wearing tanking gear myself, and while it was a close call each time I never lost. I have 41k health self-buffed in Bear form and 41k armor when I pop my trinket combo. I didn't even bother going stealth to see who would get the opening shot. Had I got it I would've destroyed him in seconds, but I figured I'd play it safe and stay in Bear form.
When you get attacked, usually by Cheap Shot because stunlocking is the new black when it comes to Rogues, pop Barkskin and any trinkets that might help lower damage taken. In my case I pop the Frostborn trinket which gives me 7k armor or something like that. The other trinket (Black Heart) will give me an additional 7k armor which makes me tough as nails on physical attacks. Thanks to Barkskin and the fact that Rogues have crap armor penetration on their PvP gear, you'll live through the Cheap Shot -> Kidney Shot combo. After Kidney Shot you should spam Bash and Lacerate to the best of your abilities. If successful you should move away and then Charge him. Move away again (out of Blind range) and start healing yourself and casting Faerie Fire on him. He'll probably do a Cloak of Shadows + Vanish thing, but Lacerate will kick him out of stealth regardless. Take advantage of his inability to enter stealth by going stealth yourself. Pounce + Mangle + Rake + Rip, then back into Bear form. With a couple of crits (I have 38% crit chance in my tank gear), he should be taking some semi-serious bleed damage now from Pounce, Rake and Rip. Get as many Lacerates on him as possible and make sure you apply Faerie Fire. Having Infected Wounds helps a lot because it makes it harder for him to get behind you again, messing up his stunlock.
Maybe I've only played against crap players, but I've had no issues with Rogues in duels. Even less in real PvP where they usually don't see me coming. Of course, if they get you out of Bear form, they'll own you like they own everyone else, but in Bear form I'm a brick of fur.