I'm personally impressed by the miniature work, but feel the added fog is overkill.
Also, that spider - even if it is from the McQuarrie art - just feels too much like the dug in Jabba's Palace to me: unnecessary cluttering of an establishing shot. Though I am very impressed by the work, I question the decisions. To each their own, I suppose, though. Of course, I'll end up watching this either way :P so I guess what I say doesn't matter too much.
At the least, I'd consider lowering the fog effect if it was added digitally to make it easier to appreciate that part of the work.