As a personal anecdote, I didn't up my pledge until I saw the stretch goal of crafting/enchanting, even though I knew it would probably hit it without my extra monies. So, I don't think we necessarily need a HUGE way out goal to get the amount upped right now.
Strategy Guide question: Will it also have extra lore/background world history and stuff like that in it? If there's room, I love thts kind of stuff in a strategy guide.