In the last game we already had up to 200...Which evidently isn't 150 at most
However, nitpicking aside, in terms of this game:
We know that a cohort had ~400 men.
There are 20 units per army/legion in TW.
Therefore we can assume it is logical to keep the max at 200 men (for Rome) so that you end up with the equivalent of 10 cohorts, or 1 legion, per stack.
The number of men per unit shouldn't be increased, just the number of units which can fight at once. This has already been happening though since the last game where we can now expect 80 units on the field at once, perhaps even greater in the future. One other thing that might make this even better is some sort of improved grouping system so that those who don't like to micromanage 40 different units (or more in the future) can create sub groups and let AI do the work, perhaps
