Just want to share a finding of UN:O (Is there a better thread for this?)
Usually, there is a refreshing issue when you try to delete your own town with UN:O. Not only the town list is not updated, but also the deleted town will stay on the map (but invisible).This invisible town can be attacked by another player, and entered by its owner. Issue persists after turn end.
This issue can be resolved by changing the owner to neutral before removing the town. For example
!!CA(x)/(y)/(z):O(NO_OWNER);
!!UN:O(x)/(y)/(z); [delete object]
!!UN:R1;
Also, HE:O-1 is more favoured on killing a hero than HE:K. This is because HE:K redirect the camera each time killing a hero, which is annoying sometimes. HE:O-1 in anther way, looks flawless.