I'm curious if any of our distinguished EB historians out there know as to why the Romans changed their weaponry later on in history from the shorter gladius/scutum kit to the longer spatha/ovular scutum kit. Could it be because the spatha was deadlier than the gladius (represented in-game with a lower lethality rating than the longsword)? Or was it along the lines of military reforms based on new non-Roman population integrated into the system who had martial traditions of their own (i.e. with a longsword)?

Also what about the transition from heavy pila to lighter javelins and even lead darts as portrayed in BI for the Roman factions (a bit outside of the EB timeline)? Thanks so much for your time!