I must say, I've never heard anyone complain as much as brits when it comes to controlled airspaces?
As I read it, the complaints are not so much about the airspace as such, but rather about the changes to it, and their rapidity, and the perceived lack of consideration and thought and afterthought. My own EBBU biotope is rather complex, too, but has been quite constant for the 15 years or so that I've been aloft - quite doable, but if they start making it a lottery then I'll be screaming, too!