Wow! First let me say a big thanks to Grace for an awesome demo. Her positive energy was infectious and you can tell she's passionate about the games she designs.
We played Astral Alchemy and I loved it. I won't spoil it, but our group did end up all winning. Though I and several others had to leave a few turns beforehand to go play 16 player Eldritch Horror. (This is the only even close to bad part of Arkham Nights; having to choose between all the awesome stuff to do)
Speaking generally, the scenario had good tension, and aweome narrative, we were fortunately able to determine our goal quickly which helped a lot, but isn't guaranteed to happen.
The new miniatures are great quality. I especially can't wait to paint the large and extra large baddies.
I could say more, but I don't want to spoil anything for anyone who doesn't want it spoiled. I can't wait to get this!