I finished creating new sprites to go with the new horses. I have decided not to create new unit cards for every mounted unit that has changed their horse, as that would take forever. However, I probably will create new ones for the Amazon factions.
In the meantime, I have been playing with descr_lbc_db.txt in order to make the city views more interesting.
It is a very simple file to mod. You only have to add in the DMB entry of the units you want in the format you already see there. They do not even have to be units owned by the faction whose cities you are giving them to. Just do not try to add a mounted unit, as it will cause an immediate CTD. Also, units weapons will not be visible, but they will still walk around as if they are holding them. Shields are also still visible. So regular infantry units look strange. However, archer and crew units will walk around in a normal posture, as will generals and captains. So they are your best choices to use. I also found that mounts (without riders) work fine. So you can have horses, camels, elephants, dogs, pigs, etc... roaming around your cities.
So in version 2.6, expect to see views like this within your cities: