My initial impressions are that it certainly looks like more Dark Souls, which isn't a bad thing. There is certainly a graphic fidelity and physics improvements and hopefully it's a lot more optimized than the first game which had some performance issues. Things like lighting torches don't seem to be great feature improvements although if a lot of areas in Dark Souls 2 are like the Tomb Of Giants in the first game then it's definitely a welcome addition to the game. Enemies breaking through walls certainly seems like it could be a frightening feature where you are trying to avoid tough enemies but they keep coming after you. Also another thing to notice is that dual wielding could somewhat be an option as there seems to combat animations that complement such a style. Hopefully we'll see some more in the near future.
adding the gameplay trailer as well.