I've enjoyed all the previews so far. The previews have given a pretty good overview of the game from a player's point of view.
But if I'm going to actually play the game, I'll be the one shelling out the money and GMing it, not my players. I'd expect many GMs are in the same position.
I'd like to see some previews for GMs and some hard numbers. How many monsters/NPCs in the book (2nd edition didn't have enough in my opinion). How many pages in each book? How are adventures written and run? How long in the provided adventure? Does the GM fight over the dice and cards with the players or does he use another mechanic? How many actually players does the Adventurer's Kit support without card sharing (I can't find an answer anywhere)?
I like the player stuff. But I'd like to know how the game will be like to run and how much support I'll get for my money right out of the first box (or two).