For those not aware its been a longtime feature to be able to outfit tower guards with player crafted weapons and armor, thus upgrading them. Though they are not capable of using mounts or archery as ranged weapons.
It doesn't get much widespread usage due to two main problems. One, anyone from the same kingdom can equip or dequip a guard. Tower guards can die from non-pvp means, even suicide (can be fun to watch ur events), thus leaving gear scattered about.
I would like to see guards enabled to use bows, and perhaps even mounts.
Additionally some permission system or setup for preventing just anyone from being able to strip guards.
Also some central storage or armory to help with managing and equipping large numbers of guards. At either the deed or pmk level.