The Mythic Greece campaign sounds like a really cool idea.

This was pretty central to my dissatisfaction with 4E. My players have long since become accustomed to D&D games where combat is not necessarily the primary component of any given adventure scenario... A system that defines its characters and their abilities specifically in terms of combat actions is a little bit restrictive when you run campaigns that frequently include entire chains of sessions without combat.

I do like how easy it is to throw together encounters, however.