It bothered me because historically, it seemed that the longer spears would make it a precursor to the Makedonian phalanx. That's why the phalanx formation seemed appropriate (without sarissae of course). And in terms of manuverability and flexibility, my interpretation was that the army was mobile in terms of being convertable to peltasts (which the RTW engine can't peform) and the lighter equipment meant that field battles would not fatigue soldiers as easily and running into position could be done. But I usually took my units out of phalanx mode, ran into position, then reformed. That was how I interpreted it. But please, if this is an ahistorical approach, enlighten me!