True....the start of RS2 is very close to the time when many armies began to abandon the pike phalanx......because of the Romans. As effective and powerful as it was, the Romans defeated Macedon with greater mobility and cohort formations.
Also, the Gauls showed Rome that their phalanx was squat in 390BC......so things were changing. Hoplites functioned more like the Triarii as more mobile spearmen.