Nah
Classes aren't classes in the traditional sense.
Classes are just a starting point, from which you select career paths, feats, and talent trees. So a warlord starts life as a fighter, and gradually diverges into warlord. Warlords accumulate followers, and the like. PrC are out. You don't suddenly become an "assassin". You diverge and accumulate the levels needed to gain the skills and abilities over a greater period of time. The play is spread out of more levels, and the game gradually evolves into epic play, rather just collapsing beyond level 20.
I seem to recall hearing that sorcerer was still in.