That would be misunderstanding. The segmented armor is one for fighting, not for generals. Never saw one depicted on an officer. Interestingly on the battlefield detected near Kalkriese in Germany and connected with the fights from 9 AD to 16 AD some fragments of the segmented armor are found, but also for example a closing hook of a lorica hamata (mail) with the inscription "I cohors". So at least some soldiers of the first cohort of one of the legion involved were equipped with mail armor. Other soldiers of the legions wore segmented armor. It was a mix. Perhaps some units got the new armor, others not (yet).
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