I'm primarily an Ars Magica player but have been playing Warhammer FRP off and on for years; I remember playing first edition way back when in the school RPG club.
I love the quality of the material put out under the second edition but I have to say this new third edition has me really psyched. For one, there seems to be a genuine attempt to do something new, not just with the game system but the gaming experience. All the comments about "30 dice and 300 cards" that I've read amount to little more than red herrings; an attempt to paint the new direction as a collectable card game (I believe that is/was out there in its own right). It's clearly not that.
For me, this is a great experiment. I think I get the way the dice will work. And if I'm right, I like it. I think I get the way the career and action cards work. And if I'm right, I like it. I think I get how the stances work, and if I'm right I like that too. And you know, for those who don't like the cards but do start playing 3rd edition, I'd put money on someone producing a PDF character sheet with all the gizmos printed on the sheet for you. Bound to happen. Of course it is. And then those groups will happily use 3rd edition rules feeling satisfied that they've done away with the cards. All I can say is, please send them to me. I'll take as many as I can get. I have two groups down here in Eastbourne that are up for trying this new edition. One wants to try by way of seeing the new system, while the other is looking for a longer-term run.
And you know what, if the game system doesn't sing along (though I suspect it will) then I have the freedom to go back to 2nd edition and 1) use the huge number of published books, and 2) adapt new 3rd edition content as it comes out. Sure, it'll be a little extra work to retro-fit it but that's small sacrifice.
But for all the moaning, which frankly has taken moaning to an all-time new level outclassed only by the hand-wringing over D&D4, there is the chance that this edition becomes a very cool game in its own right. I'm looking forward to it.