I always thought you were on the money about the 2008 tyre situation, and my problem was always the bridgestone tyre ducati took a leap into the void and expended several years to develop being taken away, not bridgestones being made available to other riders.
There was the engine related dnf followed by reversion to the 2007 engine, and the bike not just being unwieldy but not wanting to turn at all at jerez and estoril. I wondered at the time whether this was the result of an attempt to make the bike "handle better". perhaps even at stoner's instigation, as talk that he couldn't dogfight with rossi obviously rankled. If so, it had similar results to the attempts in 2010 and 2011. I am not sure why they went carbon fibre either, although the perceived wisdom at the time did seem to be that it was antiquated and off the pace, and I believe stoner was frustrated they couldn't give him a number 1 and number 2 bike that had more than a passing resemblance to each other.