And some faction specific bonuses, and new skins for more than just a few units.
How many unique skins and units do you believe each faction will get compared to a generic color and emblem reskin of basic Greek Units?
If you believe that to be correct it suggests if you buy the game without the DLC these factions purely under AI control won't have unique 'Spartan Hopilites' or 'Athens Marines' and merely generic 'Greek' tech and units, this I don't believe because what is the damned point of telling players 'look no more rebels all unique factions'. Similarly there will most likely be a Dacia faction not playable but there for later conquest. By the same logic they will only receive generic Barbarian (German or Celt who knows) units and not 'Falxmen'.
Also writing/scripting etc the political elements for the factions, and probably voice work as well.
Scripting what, no Total War game to date has offered such a degree of faction specific scripted events. Maybe they will all have 'Heir to Alexander' or some such but unique items other than the tick boxes for a 'victory condition destroy x and x hold xx provinces' I don't think it is likely. Also I going to bet that the bulk of the voice work will still be generic 'Greek accent voice' though there will be a 'THIS IS SPARTA' or two and the ever so useful pan around the map intro crap from your adviser.
They're not putting no work whatsoever into it. And day 1 is stretching it considering the whole skinning/animating new units thing.
I said minimal not 'no work'. Day one is indeed stretching but as the more important point about having these factions is their different starting positions, wealth, allies, and enemies, not their rosters. How different are late Hellenic armies going to be to require different animations, other than Spartan kicks into wells, Epiriote and Athenian Hopilites are going to stab their spears different?
Look I'll be more than to be wrong, maybe this game will restore my faith in CA. However until proven otherwise all stick with my cynicism. In three months when this is released and these faction are really thought out and look like CA spent plenty of time on feel free to rub it in my face as I'll be waiting to play the 'I told you so' card.