Exactly.
Read the posts to Kropotkins article on day 2 testing on his site, regarding the unique Ducati L shaped engine and the fact that it is used as a stressed member part of the frame construct. Perhaps the fundamental design of the bike IS , and always has been flawed; limiting tuning of the chassis for front end feel and grip. Only Stoners good results have disguised the fundamental design fault of the bike and made ducati complacent. A total redesign will be necessary for Rossi to get a podium next year. Does Ducati have the money or willpower to do all that for only one more year of 800s? I doubt it. Changes will be made; radical by previous years standards , but still not enough for a good 2011. I suspect that the 2012 Ducati design has already been penned in, but now Ducati may have to swallow their pride; ditch the L shaped engine, ditch the stressed member engine concept and copy the the Yamaha/ Honda design features. It will mean swallowing a lot of pride, but may be essential to be competitive??
http://motomatters.com/news/2010/11/10/motogp_valencia_day_2_notes.html
I agree with what j4rno said early on when rossi to ducati became a done deal, that everything will be up for grabs (with the 2012 bike anyway), including engine configuration and chassis design. I think yamaha made major engine changes at his behest. I also agree with whoever said it is ducati who is under the most pressure.
I think casey came up with a unique way of getting the 800cc ducati through the corners that didn't involve the conventional corner speed approach, which relied heavily on the properties of the unrestricted bridgestone tyre of 2007 , and perhaps involved a synergy with tc that pre-tc era riders did not have, or at least being prepared to push the limits further than most of these riders. I strongly doubt as you and kropotkin do that the current ducati design elements can be used to make a clone of the current yamaha.