With 7th ed coming out in a few months, are people clamouring for it, because 6th ed is broken in some bad way?

I'm asking because, I bought 6th ed about 5 years ago, having not played WFB since 2nd ed back in the 80's. But since buying the game, and the new (and then the newer) Dwarf army books, I don't get chance to play WFB - I think I've played 4 games in 5 years.

So... what's actually wrong with 6th, that people are hoping/expecting will be fixed in 7th ed? Should I be looking to buy a new shiny book/box in September, on the offchance my group actually gets to play WFB, or is 6th ed perfectly serviceable?