Which reminds me of another thing, you should be able to recruit a unit, and choose the amount of training they shall recieve.

If you have no enemies near your borders for several years and wish to save more money, you may want to lower the cost of your army by lowering the training. In a way, it creates a scenario where the performance of your army varies, not because of experience alone, but training as well.

This means some armies can be said to be a professional army, taking a long time to train, with you allocating a decent amount of resources and time for the unit's training. In case of emergency, you can raise a conscript army with less training.

Basically, for some units of Roman legionnaires, you can divert them more training and resources, while for other Roman legionnaire units, they will have less resources and less training. They are still the same units, but their unit attributes can vary.

Other than that, being able to orgainse the list scrolls helps alot, if you want to keep track of 20 over armies.