The time frame of RTR 6.0 is from 280 BC to 1 AD the Romans simply did not use square shields or lorica segmentata during this period. Round shields and mail were the most common equipment for the legions during this time frame and RTR reflects this. Rome is one of the better researched factions in RTR and I am certain it is correct as it stands. I hope you will enjoy playing RTR as the Romans and as other factions our desire is not reduce the "cool" factor of the Roman troops but only to stay true to the aims of RTR which is historical accuracy.