That's because they've been using the RPGA to beta test their stuff and (unfortunatly) been listening to their suggestions. The results are fairly obvious, some stuff gets powergamed(Warblade) , some stuff gets nerfed (Truename magic, we've had one in our game for a while and she lawyered like Cochran to get every possible bonus at her level, without the Amulet of the silver tongue she has to roll 18 to affect something equal CR/HD to herself. Anything higher it starts becoming roll 20 or fail. It got so frustrating for me, much less her, I pretty much just handed her one)
Its also started affecting how some of the adventures are written. More and more their becoming 'let us DM for you', which would be fine for newbie or uncreative DMs, but I'm finding less and less use out of sold adventures and I've gotten more out of the back pages of Dungeon than the adventures.