Everything I've read about the upcoming Revised 5E sounds pretty good to me, but I will add this:
One of the things I like most about the current edition is its sturdiness. The thing can take a handling and a beating. I seem to recall reading some time ago that Fred got his hazing by being thrown in a laundry dryer for half an hour or some such. I've never tried that with mine, but it sounds pretty tough, and all I can say is that I've carried the bugger around with me for over about a year and a half now in three different cities across the U.S., in rain, snow and shine and it still looks good. Granted, the cover is nicked up a bit and the whole bottom edge of its pages are a little warped from my dumbass leaving it sitting in my bookbag in a pile of melting snow for two hours, but damn if it doesnt still look good. The spine is nice and strong still. I like that a lot (ahem, cough, cough to all you game companies out there that make a book that's all style and no substance and can't hold up to real-life gamer usage).
And that brings me to the paper itself. I love this stuff! You guys definately need to keep this paper going. Like I said, mine suffered some water damage, but it's nothing compared to the fate suffered by other books of mine in the past (something about my books and water, just cant' seem to avoid it). Plus, and this is another important point to me, the paper is perfect for colouring on with coloured pencils. So, what am I really saying when I say that? Let's have more artwork in 5ER that's worth colouring in! I'm serious! Hell, include a coupon for a free set of coloured pencils or something in all copies sold at major bookstores (Borders, B&N, etc) to get all the non-gamer types who might be looking at the book for the first time more interested in it.
For that matter, let's see the book sold at some of those major retailers. I think seeing this book in stores outside just the gamer-specialty shops might go a long way towards recruiting new players. There are a *lot* of so-called "mundanes" out there who would really dig the excitement of gaming if they had a chance. So why not include a little appendix or something giving some advice and guidance for the new folks on how to find more about the game, how to set up their first session with their friends, something like this. I don't know. Something that someone casually browsing through the book would see easily. Maybe it'll help a couple people who might not buy the book because it looks too dense or intimidating give it a try anyway.
But yeah, I'd say keep up the toughness of the book, the greatness of its paper, more colouring-worthy artwork, and a tad more user-friendly in terms of organisation of information... some stuff seems to be scattered about... I can't think of anything right now to back up that statement, but it just feels that way sometimes. But the index is fantastic and has always come to my aid when I was stumped for where to find something.
Thanks for listening