Duacti, engines, frames and where it went wrong
Well, not exactly as I haven't a clue.
But, Benny, I think you're being a liitle speculative in your evaluation of the the transition from GP6 to GP7 and the reasons for the latter's lack of rideability.
Going back to about 2004/5, it was about then they moved to the Bridgestones. Having Bridgestone develop the tyre with them helped improve the performance of the bike throughout the season and by the time the GP6 arrived, they had a pretty good package. Interestingly, they had the same issues with power then as they have now and the GP6 had revised power delivery, less aggressive so that the bike was slower, but ultimately faster around a track - much like the 2003/2004 M1. What Ducati will also be hoping for in July no doubt with the revised power characteristic of the revised engine.
Interestingly again, the GP7 in tests got very favourable reviews from all riders, so I'm not sure it's right to say that the GP7 created a series of problems that had never been faced before on the GP6 and previous Ducati's. Capirossi confirmed the engine to be not as powerful as the previous 990 and more like a 250 to ride and it received praise for its better handling, faster cornering and better drive out of corners, no complaints about the handling of the bike or the engine. Even the satellite riders were putting in good times.
But what happened to Capirossi and the satellite riders from the first race onwards is anyone's guess. From the positive testing and feel they all had with the bike, something changed and none seemed to be able to ride it consistently apart from Stoner. Why - that's the question - and something to which we'll probably never know the answer.
But, as a bike, the GP7 was rideable by them all prior to that first race, so as a design, it must have worked.