Interview at CVG!

[L'Impresario]

This is quite encouraging, AI mentioned lots of times as well as having a paragraph for MP that provides actual information.
Actually the lack of eras could have broken gameplay balance by itself and impose a single playing style.

[Lord Adherbal]

yes, definitly good to hear they're back (I wonder if they listened to my complaining about this :P). Without Eras balancing would've been impossible, or atleast there wouldn't been a lot of obsolete units and armies would be unrealistic mixes of units from all periods.