All of those features already exist.
Cities can be created, renamed, and moved. To create more cities, add population. Armies can be organized in a variety of ways. Parades can be held by moving around festive military units with their blinking light show.
I agree that parades are indispensable, going back to ancient times.
Surely you remember the depiction of an ancient Egyptian parade from the spectacular processional scene of Verdi's Aida. And the Romans celebrated great military victories with a parade called a Triumph, which climaxed with the public strangulation of the conquered enemy leader. (Exactly what this game needs.)
So enjoy your own parade. You can invite guests by going to your war page and allowing foreign units from specific countries. Their military units also can join your parade.
For musical accompaniment during the festivities, I recommend you play Tchaikovsky's