To be honest, it looks identical to the beta leak from a few months ago. Maybe it's indicative of something (both good and bad). Oh well, a little more than two weeks to go before we know for sure.
I never played the Mass Effect demos (only the full games) but I remember (from video footage) that dialogue sequences were very few (and mostly not indicative of the final dialogue sequences). Maybe it's the same here.
I'm not invested in the series, i haven't been following up on anything related to the game. I didn't even know about the leak untill i saw it mentioned in this thread ;)
As someone who at best is mildly interested in the game i have to say that the demo didn't make much of an impression on me. The writing felt sub par, the models look wrong somehow, i'm not sure how to describe it but there's something off about the models besides the shifty eyes and the weird squinting thing they have going on, very distracting. The one key fits everything is something i just can't understand. I'm sure it's one of those things people will adjust to eventually but that doesn't make the decision any less idiotic.
But yeah, the full game is around the corner and hopefully more polish went into in than what it went into this demo, it seems to me the demo lacked a bit on that department.