Well I wanted some clarification on exactly why they won't improve it. You didn't seem to go in depth enough about it. And even if you did you wasn't very clear about it.
But yes it can't be done because they might as well make a whole new game (or expansion) than make improvements of such calibur. Is that what you meant?
It's a shame too as much as I like this game some of the major faction quests felt incomplete. Really incomplete like no progress beyond a certain point (Bards college), or forshadowing that never came through (college of winterhold). It is glaring in many places that they cut things short, as if they ran out of time.
Yes, indeed. That was exactly the meaning. I thought it was made clear.
I am sorry f it was confusing or read in a tone of... Darth Vaider.

I completely agree with your last conclusion. While I am afraid there is nothing that will be done to the current game, in the regard of the points made by the young lady in the video. We can only hope that Beth takes notice to the concerned comments of the loyal fans in this and other forums. We can only hope that it is implemented into future DLC and the next game.
I was fortunate enough to have participated in the Dawnguard Beta. I spent the first 3 hrs trying to figure out how to start the questline, without having my Vamp character enter Fort D. It made absolutely zero sense for a Vampire to start the DLC by aiding the Hunters. If your char is a Vamp, they should have been approached by a Clan member (Vampire) to meet in a cave or Castle V to initiate an invasion on Fort Dawnguard...or whatever. This is the exact same thing that has upset the masses of the TES family.