So I had a think, and I've come to the conclusion that Rossi's and Spies' fates are intertwined.
In a nutshell, I think Spies is still riding Rossi's old chassis. The Rossi-chassis supposedly has a flexible headstock that improves feel. Rossi's chassis derivation is setup to work with a softer front and harder rear (classic Rossi) or it is at least designed to create that feeling (according to Spies last season). The new medium rear tire, mixed with the old hard front, has hurt the balance of Ben's bike, and he's trying to ride around problems he can't really ride around. Imo, Yamaha wanted him to abandon the old chassis, but Spies refused. This has created friction between Spies and Yamaha and Spies and his team. Jarvis issued a public ultimatum.
Imo, the flexible headstock design was quite advanced, and it is not something FTR and Ducati can recreate easily. I believe Rossi is concerned primarily with the front end feel. From the perspective of the team, a flexible chassis changes almost nothing other than the rider's mental approach, and Ducati/FTR might not see it as an effective development. Imo, this is causing friction between Ducati and Rossi. JB is siding more or less with Ducati b/c he knows throwing money at a flexible chassis won't really change the performance of the bike, only the feel, which will change as soon as the new tires are released anyway. Rossi is convinced he needs chassis feel regardless of future tire developments, imo.
That's my theory. Spies is on a bike that is designed to work according to Rossi's riding/setup philosophy. The tire imbalance has basically rendered his chassis obsolete. Without a flexible chassis, Rossi is lost at sea, complaining for updates to the bike (most likely the chassis). The only hope for either of them is to find a miracle setup or to rely on the handling characteristics of the new front tire.
In a nutshell, I think Spies is still riding Rossi's old chassis. The Rossi-chassis supposedly has a flexible headstock that improves feel. Rossi's chassis derivation is setup to work with a softer front and harder rear (classic Rossi) or it is at least designed to create that feeling (according to Spies last season). The new medium rear tire, mixed with the old hard front, has hurt the balance of Ben's bike, and he's trying to ride around problems he can't really ride around. Imo, Yamaha wanted him to abandon the old chassis, but Spies refused. This has created friction between Spies and Yamaha and Spies and his team. Jarvis issued a public ultimatum.
Imo, the flexible headstock design was quite advanced, and it is not something FTR and Ducati can recreate easily. I believe Rossi is concerned primarily with the front end feel. From the perspective of the team, a flexible chassis changes almost nothing other than the rider's mental approach, and Ducati/FTR might not see it as an effective development. Imo, this is causing friction between Ducati and Rossi. JB is siding more or less with Ducati b/c he knows throwing money at a flexible chassis won't really change the performance of the bike, only the feel, which will change as soon as the new tires are released anyway. Rossi is convinced he needs chassis feel regardless of future tire developments, imo.
That's my theory. Spies is on a bike that is designed to work according to Rossi's riding/setup philosophy. The tire imbalance has basically rendered his chassis obsolete. Without a flexible chassis, Rossi is lost at sea, complaining for updates to the bike (most likely the chassis). The only hope for either of them is to find a miracle setup or to rely on the handling characteristics of the new front tire.