I personally think there are already more than enough Hellenistic factions in game at present. There were tons of other prolific and highly independent peoples during this era. EB2 has already added several more Hellenic factions than before, and several non-hellenic factions have reforms that thoroughly Hellenize them(eg. the nabataeans). As well, the KH represent a number of highly independent city states which, while individually not strong enough for a faction, together can be considered as one and somewhat tries to represent the chremonidean league which fought against antigonos gonatas. For the philhellene there is more than enough to sate your hunger, in my perhaps unneeded opinion.
I also think that these last two faction slots should be instead used to demonstrate a new culture and people. I'm sorry, but the Hellenes just weren't the only culturally significant, militarily powerful and technologically advanced culture during this time period. As great a people they were, stretching as far west to the eastern coasts of spain and as far east as baktria and eventually india. Occupying significant portions of coastline around the Mediterranean and black sea, Hellas herself and the bulk of former persian territories, which is a large portion of the map--most of which EB2 factionally demonstrates. Outside these areas, however, areas like the interior of hispania, northern italy, gaul, germania, britain, the furthest southern reaches of the nile, arabia, the baltic etc etc etc. the hellenes have almost no significant populations, military forces or cultural presence there. And to say that: "That's because the Hellenes were too smart to colonize these

provinces with harsher climates, they were much better at choosing sites for colonization and etc." is a bit far fetched and prejudice at best.
I also don't think the starting positions of either massalia or syracuse are very good. Especially that of Massalia, that would make the map in that area far too crowded. I've found the very strong eleutheroi presence in eastern spain and massalia's territory are more than enough to demonstrate the independence of the Hellenes in game.
Again, this is just my two cents on the matter.