Creator Breakdown: Evident in Tragic Kingdom (out of a combination of Gwen and Tony's relationship ending and Eric's worsening depression and withdrawal from the band) and Return of Saturn (largely thanks to the album's protracted recording and Gwen's difficulties in maintaining a long-distance relationship).
Development Hell: Promised a new album in late 2010. It eventually came out in 2012.
The Pete Best: A lot of them. There were 10 initial members, of which a grand total of two were still with the group by the time they released their first album. One non-original member had also left by then, and three more would be gone by the time Tragic Kingdom made them truly big.