Actually, there ARE spartan hoplites ingame. Tough guys, only unit with increased hitpoints that also has normal size.
BTW. I've messed with my units a bit, to rebalance the game a bit toward special units. I am playing with vanilla speeds and 2 HP, so I did a little rebalancing I thought was nescessary. Some special ranged units (Kestros, Gastraphetes, Cretans) got point or two extra attack, and double hitpoint units, that previously were only 3 hp, either got 4 hp or 3 hp and slightly increased unit size, but all also got increased cost, and 4 hp units got increased recruiting time (except Spartans, that went from 30 to 10 turns). Direct fire artiller got increased number of launchers, ballistas got 4, repeaters/scorpions 5.
If someone wants to give this a try, to help me balance it out a bit, I can upload the file. My XGM options are 2 HP, faster movement, fatigue on.