Because DA 2:s ending smashed and shattered the whole the "wardens story is over" into a thousend pieces. Biowares own ignorance brought the warden back unintentionally or intentionally.
No, it didn't. Because if you took the US, they're looking for the Commander of the Grey, which is not the HoF. Again, however, this is why people are sick of "bring back the Warden". Once again, people want to throw everyone that didn't do what they did under a bus. I swear, I'm going to start "Weed out the riff raff Wednesday", and start making a new thread every week, or more if I'm bored, about how the US should be canon, and just throw everyone that didn't want to take it under the bus.
I was content to leave those people alone, not everyone has the intestinal fortitude required to know that an action is going to kill off their character and take it. However, as we can see, there are some people that can't respect other player's choices, and insist that the only choices that matter are their own. What did DG say? Oh yeah, Suck it up Princess, you're not the only person who played the game, and the way you chose to end it wasn't the only offered option. The very fact that you could choose to kill off your character should have been a clue. It wasn't, perhaps it was too subtle for some players to pick up on it.