I've put in a regular check for legions generally to adjust their command
structure to the correct size (e.g. a legion of brigade finds itself
with less than 250 men for whatever reason, it automatically shifts to
regiment size.
You'll also find legion formation included in inter-legion melee
messages, i.e. when one legion fights another.
The above and a few more little informative or convenience tweaks have
been made; nothing that requires anyone to change tactics but hopefully
will make the busy battlefield a bit easier to follow.
Written by my hand on the 1st of Midsummer, in the year 1281.