I'd rather WoTC release a whole shelf-full of adventures than another "Complete Tosh" book containing broken feats, rogue-a-like prestige classes, wizard/fighter base classes and Yet Another Once-Was-Human race.
Adventures is what they do well, and long may they continue
Of course, if they created adventures that *also* showcased New Stuff as well (say, a new race like they did in Deep Horizon), and maybe a prestige class or unique feat that's only available in this adventure, then everyone is happy.
How about:
"My children, the bugbears on this blasted heath have been using displacer beasts against the hobgoblins to the North. I fear that they are driving them toward our village. Investigate and stop them, and I will teach you the secret of Kelvar's Towel Stance. This will allow you to defeat even the mightiest of foe while wearing only a bathrobe. I shall take one of you as an Initiate of the Towel. It is a great honour."
Then you'll have the Towel Stance feat and a new prestige class, both of which have the prerequsite of "must be one of the adventurers which solved the bugbear problem for Kelvar". Of course, if there aren't any displacer beasts, but a special Displacer Bugbear tribe that's fully stated up, you've also got a cool new critter too.
Crunch, and adventure. Works for me.