I think people might be focusing on the power source too much, instead of the role, so as of now I'm thinking the classes break down as (this of course could/will change):
-Cleric (divine leader, d8 hp, 3/4 BAB)
-Fighter (martial defender, d10 hp, full BAB)
-Paladin (divine defender, d10 hp, full BAB)
-Ranger (martial striker, d8 hp, 3/4 BAB)
-Rogue (martial striker, d8 hp, 3/4 BAB)
-Warlock (arcane/divine? controller, d6 hp, 3/4 BAB)
-Warlord (martial leader, d8 hp, 3/4 BAB)
-Wizard (arcane controller, d6 hp, 3/4 BAB)