I like dice, I'm all in favour of dice. If I wasn't I wouldn't own hundreds of them in various sizes, colours and numbers of sides. I think they do a great job of randomising things, like the outcome of tasks in RPGs for instance.
What I don't like is the idea that lots of unique dice with different symbols on give you "unparalleled story-telling options". They don't. A decent imagination does. The dice may act as a crutch for those with a lack of imagination but that's about it.
Even though I've made it clear that I don't think this new direction will appeal to me, allow me to defend the new edition for a second. You could also say that "dice served as a crutch for those with a lock of imagination" for the previous editions of WFRP as well, what with all their random tables and charts. What purpose did they serve if not to tell a story?
Isn't the situation more complex than just black-and-white, you either have an imagination or don't? Some people, many people, have an imagination and enjoy roleplaying, but may not be able to think of a specific idea (such as a type of disease or insanity) off the top of their head, and so the dice and accompanying mechanics exist to help the GM and players tell a better story. There's been plenty of times when I've had troubling thinking of something off the top of my head and was glad I had these things to aid me, especially since WFRP has a very specific flavor that must be emulated at a moment's notice.
Lastly, the unfortunate line about using dice to tell stories is could easily be a marketing gimmick and may not actually perform the function a lot of us our imagining. In fact, it could be little more than the aforementioned random tables. It certainly wouldn't be the first time a company repackaged an old or current idea with a flashy new name and advertised it as something new. Hell, as has already been pointed out, FFG is drawing attention to the new game's 40+ careers as something to write home about, when it's obviously not a big deal to anyone who's played the past games.