I found an amusing player review that sums up my feelings on the demo pretty well: http://grimlyenthusiastic.wordpress.com/2011/02/25/lets-play-dragon-age-2-the-demo/.
Poor level design, poor encounter design, dialogue that can be described as superfluous and pointless, choices that all lead to the same consequence, forced combat.
I fail to see how this addresses any of Dragon Age: Origin's problems at all. They changed the combat style, but that wasn't really the problem-- it was the load of filler combat and poor encounter design. And the good old Bioware "choices" are back, too. You can't even choose to let that Darkspawn taint guy live, and have to live with the consequences? Even Fable did that (okay, he was bitten by a wolfman, but same thing). I especially like how they changed the whole combat system to something more actiony, even though the real problem was with the encounters themselves being excessive and boring.
Great game. 4/5