I saw the first preview. My favourite part if Act 2 was actually Pure Imagination, and I didn't feel that the elevator was needed, funnily enough.
Don't get me wrong - I really enjoyed it as a west end show: I didn't even get hyped about it before I saw it either - it's just that after seeing it I felt that they missed an opportunity to create a potential west end classic.
Had they got it spot on it could have been up there with the greats because as a book it's *that* loved. From what I've heard that's exactly what they might have achieved with Matilda (which in fairness I've yet to see). It's just a shame this doesn't seem to be getting the same adoration.