What I'd like to know his exactly how much protection warrior dps as changed. All the talents seem too good to be true.
Protection Warriors seems like one of the class/spec combos that have changed the most in Wrath. Their tanking is incredible and a lot more versatile now (all tanks are, actually) but you're asking about DPS and not tanking! Their DPS is good. It's not as high as DPS classes/specs, but it's not abysmal like it used to be. You might actually be DPSing with your shield equipped for the huge Shield Slam crits rather than dual wielding, even when you're not the one being beat on.
I don't have any concrete numbers or DPS charts for you, but I can say that what I've seen is really, really impressive. In yesterday's Ask a Beta Tester, reader Friday Knight gave you some more in depth information about the rotations of each spec, so I recommend reading that if you missed it. His information and what I've seen myself makes me want to gear up a Prot Warrior alongside my Prot Paladin instead of having just one tanking character.
If somebody shoots a fireball at your group while you're riding the mammoth who takes the damage?
Whoever they targeted. You can all be targeted individually.
How does the whole passenger thing actually work? Like, if I were to ride on someone's mammoth, would I be stuck in place like I were riding my own mount? Or would I be able to move around the mount freely like say the tram or on a boat?
Yes, you are stuck in place. You sit in your seat and you like it.
Regarding raid gear: If the gear from 10-man raids is one Tier below the 25-man version, that must logically mean that, having completed the entire 10-man progression path, there will only be one 25-man dungeon with any loot better than yours. Won't this completely discourage people from progressing through the 25-man versions of the raids? (Until the very last one, of course)
As a reader mentioned, a lot of guilds intend to do both 10 and 25 man versions of raids to gear up quickly. I, personally, expect we'll see a lot fewer guilds doing 25 man content, but that's only my opinion on it. 25 man content just isn't rewarding for the added effort it takes, I think. If anything, yeah, they'll have 10 man teams until the end of the 10 man bracket, then they'll tackle the final 25 man. We'll see how the system works out in the end, I think it will still have many flaws to work out.
With Death Knights being a Tanking/Melee DPS class, I have to ask do they have any kind of Threat Management or a full Threat Dump? Or is it going to be like a Fury warrior, your threat dump is to take one in the face and die?
I hope you like taking it in the face because as a Death Knight, you're going to be doing it a lot. ...Uh. You know what I mean. As far as I know, it's a lot like Fury Warriors. No threat dumps. On the bright side, if you're specced properly you get to come back as a Ghoul when you die! That's fun, right?
Quick question about loose ends in Naxx lore: Is the whole Kel'thuzad's phylactery thing cleared up?
Regarding Barbershops, I was told there are only three chairs that can be used and everyone else must wait in line. Are there any mechanics in place to prevent griefing cause I am very sure on my server of Kirin Tor, that you'll have people taking the chairs, then going AFK for the next 3 hours to insure that no one else can use the barbershop.
It seems like when you sit down in the chair, you fade out from everyone's view and everyone fades from yours. So you won't need to worry about griefing. I think multiple people can use each chair since you can't see eachother, and nobody can stand on top of you keeping you from seeing your haircut.