A lot of them were rather easy to decide:
Tank: GNB (I like how biúsy it is, and EW is more of the same, while still gating WAR selfheal way higher lvl wise than back in SB)
Heal: Ast (the least bad healer, unless there are big changes between media tour and release)
Magic DPS: RDM (not goign to touch SCH again until they fix the bs they did to it at the start of shb thus no smn, don't have BLM leveled)

only ones really hard to decided are melee and ranged phys. And i'll probbaly see what I run them on once I get through the other three and managed to get some time to feel how each of them plays in EW.