It would be nice if the Roman generals were assigned as legates to legions.Something like the offices assigned in RTW or the offices in BI,magister militum etc.
For example when a general builds a fort in Spain,then an office would be assigned to him as the legate of LegioIHispanica.If another general builds another fort in Spain,then this legion would be LegioIIHispanica.And when a legion that a general commands fails to be bribed by an enemy then a name will be added like LegioIHispanica fidelis.Something like that.
I don't know if this can be done,although it would be nice.