Hindsight is 20-20, let's not bag on Bartoli too much. Lots of other riders went to CSC and got a career boost: Julich, O'Grady, Voigt, Hamilton, Cancellara, Sastre, JaJa, Basso-- all went up a level while riding at CSC. Julich and JaJa were the poster boys for that template of twilight careers being revived. Who can blame Michele for wanting to see for himself? It didn't work out, but again, that's hindsight. I don't think his teammates begruded his attempt, Julich wrote somewhere that Michele visited a CSC training camp post retirement and was warmly greeted.
Another name nobody has mentioned-- Cipo. It was almost like he made a Faustian deal, in 2002 he won M-SR (finally!!), Gent-Wevelgem and the WRC, but after that he never really had a high profile victory. I personally am glad that he came back for Rock even though the best he could do was 3rd in a ToCalifornia sprint because that was my one shot at seeing him live, and I must admit, even then, he exceed the hype-- I personally witnessed women swooning over him.