I don't know... I guess we can always hope for more (I do too), but I did enjoy the Fallout-esque summaries of the character's and locations you visit at the end. I also enjoyed dealing with Redcliffe's situation, especially since I didn't know of the third option at that time.
What would be an example? I know it won't be perfect, but going back to Redcliffe, I was happy to see myself get a verbal lashing from Alistair at the party camp after my solution.
That's fair, it is a combat heavy game for sure.
I think it's mature in that it's dark, where sometimes the choice you make is the lesser of two evils (or greater, if you prefer). There have actually been posts on the main board of people complaining that it's TOO dark and depressing, so I guess your mileage may vary.
That said, the game certainly has its silly moments, so it's definitely not serious all the time.