I found Death of X very very meh – the central conflict that Inhumans vs. X-Men is built on doesn’t make any damn sense as a result.
So with that rather enormous caveat, I’ll say that the Inhumans vs. X-Men team are doing a better job of making bricks without straw, and there’s some really interesting ideas here (I really liked the Jean Grey/Karnak “fight” as a clever use of telepathy), but it seems to be heading toward a rather clumsy outcome where the X-Men are restored to Earth and the Inhumans go off to space to trace their Kree ancestry or something. Which isn’t a bad status quo, but the weirdness they had to go through to end up there is bizarre.