Just installed, played and finished the demo. So far, i'd have to say i'm liking what i see, but there are three things i'm not that pleased with.
I. Races: Short and simple, i dislike being forced to play a human. I work in a store, i see enough of them irl without wanting to play one in a game as well. DA has several options to choose from in this regard (Elf, Dwarf, Darkspawn in RtO, possibly Qunari in II), and even without each of them having their own Origin story it's still fairly easy to have some minor adjustments to allow for this. This is, of course, assuming the character doesn't refer to him or herself as a human a lot. You could even use the same voice files.
II. Camera: Isometric was nice because it allowed you to see a lot of what happened behind you. Without it, an option to have the camera facing whatever it is you targeted would be rather nice without having to resort to pausing every 3-5 seconds to adjust the camera. The Ogre in the demo isn't that hard to beat, but i'd want to keep an eye on how close that Act Boss is if i'm playing a squishy mage.
III. Friendly Fire: Several times in the demo, my tactics were to send in some melee troops, have the enemy gather around her and fire off the Area Spells of Fiery Death. The party members on Meatshield Duty didn't seem to mind much, i assume they'll take damage from (deliberately) badly aimed fireballs, Rain of Arrows and similar techniques in higher difficulty settings?
My two cents