My take, and I know that quite a few people will jump on this and rip me a new one:

If you don't like the game as it is right now, you will not like it any better when Mistlands comes out. It will be - as usual - not enough, too late, or whatever other "reasoning" these people come up with.

On the other hand, if you like the game for what it is right now, and think that less than 17 Euro is a more than fair price for the current game, you never had much reason to quit the game, and you will gladly continue playing it.

I know, there's people inbetween all of this, and they may, or may not find the expansion suitable to them or not.

If you have 5 people in a room, you will get 8 opinions. And it's really nothing more than that.