I love it. even the combat looks much better. The fact that instead of shadow and light magic, you have two special dedicated weapons for them, makes combat much more varied and interesting.
I do wonder what the deal is with kid Trevor. I mean, we saw in the trailer, that Carmilla is back as well, in her Human, Brotherhood form, no less.
This all definitely has to do with the castle, but what to do with it remains to be seen. of course we do know that despite monsters in the castle recognizing their master, the castle itself no longer does. (the downsides of having a living castle... go to sleep for a few thousand years and forget to feed it souls, when you wake up that shit tries to kill you. tsk tsk)
EDIT: I'm glad I'm not the only one who sees Victor as a polished version of Proto-Simon/Gabe
Someone should point that out to Cox