The biggest thing I want is a synopsis of the scenario, with all hooks and major players, right up at the front. I won't wade through the entire product to find out what is going on.
The second thing is good maps.
Thirdly, I could do without the stat blocks. That data is available for free via Google, so stop wasting pages and cluttering up the product.
Fourthly, quite suggesting courses of actions for the PCs. Players are generally twisted individuals and will come up with strange and convoluted plans (or just barge in and kill everyone), so again, quit puffing up the word count.
All I need are maps, location descriptions, a crisp summary of the major players & their goals, intentions, and resources, and a concise summary of the plot a the front. I'll do the rest, and odds are good I'll change a lot of things, anyway.