Well, I am actually slightly worried about that (namely, verticality in puzzles/exploration).
Surprisingly ... Im not.
Fextralive talked very highly about them, so i presume it was interesting and pleasant experience ... either that, or he is much more polite person than i am, bcs IF i would struggle somewhere as i did in Patch 1 in spider cavern, i would talk about it for at least half hour ... and not even single word of it would be polite.
I still dont understand why cant we change Race for our hirelings. Lets us play Githyanki as racist as they trully are!