I really feel that this is not necessary. There is a general for a reason, marshals as well.
Yes, that is true. The general is there to lead the armies,
not perform unnecessary busywork. He should not need to give constant reports to the ruler on the total strength of the realm's forces, a task that should be performed by a scribe or other servant.
This is made worse by losing the relatively up-to-date stats page. I really do not see what is unreasonable about the ruler being able to know what the strength of his armed forces is at a glance, given that any lord of any tiny region can access the information.