I just spend 20 consecutive repeats looking at the little fog video; and I'm quite fond of it. I haven't seen/played EWoM, so the whole art style is novel to me - but it is really well chosen and implemented. Kudos to the engine programmers and artists.
The fog itself doesn't scream anything at me - which is a good, there is nothing glaring at me as wrong or ill implemented.
What did bite at me, though, was the tree-flip.