The little things may not matter even a little for the Inquisitor. Some choices may be mere blips which doesn't alter anything for DAI (if it never even gets mentioned) and it could also not matter for a future DA game. I really wouldn't want to see them add choices which they will never even address.
The character models for the Warden and Hawke don't have much to do with the Keep really. We know that there is no CC inside the Keep, so if we end up being able to change the appearance of those characters it would have to happen inside the game.
And as far as I know there hasn't been any news on the matter of imports. The last comment was about them still trying to make it work with the hint it may end up not happening. I am of the mind they will probably not get it to work at all.
No they may not matter to the inquisitor, but that does not mean they won't matter to me/the player. I mean to the Inquisitor it might just be something inconsequential, just another thing in the masses, but I myself might recognise it as something I potentially did. I think that'd be fun and more personal knowing that I helped create the world I'm playing as the Inquisitor in now, even if they don't recognise that. Perhaps just wishful thinking, but still, fingers crossed on my part.
I have a feeling we might just be left with default character models for The Warden/Champion, oh well.
Thanks for the info though, hopefully it all works itself out. 