My initial impressions were more positive, because the "challenge" Tomb actually stopped to make me think for a second before I figured it out, as opposed to the first game where I figured out the solution and didn't realize it was supposed to be a "puzzle."
But now I've completed 7/9 of the challenge tombs and they're not huge multi-room events as I thought they would be (pretty sure I've read somewhere that that's what would happen). I don't know how far along I am in the main game, but yeah, this is more of the same. How much you'll like that will depend on how much you enjoyed the first game. For me, not much at all.