Aha, the first updates are available, and my Klout score has improved:

I've gone through the update announcements, and I'm very curious about the 'moments' functionality. Klout has removed the True Reach, Amplification, and Network Impact subscores in order to make room for a new feature. Moments will show us how our posts from the past 90 days have impacted our Klout Score. That could be interesting!
I was also suprised to see my new 'Klout Style'. I used to be qualified as a Networker or a Specialist (the lower-righ corner where you find Valérie 52, Garry 51, Felix 42, and Filip 40). Now I'm a Broadcaster, along with Koen (62), Michaël (62) and Bert (59). Bart (71) and Davy (68) are Pundits.

Just to clarify some of Klout's definitions:
I understand why I went from consistent to casual, or rather from creating to sharing (I'm writing my third book, I don't have time to create other stuff). How did I go from focused to broad? Or is it because I'm now participating more rather than merely listening? In any case, I'm very curious to find out more details soon, when the 'moments' feature is released.