Ideas and suggestions.

A great feature would be calculating movement range using the Alt key, including while the opponent is taking their turn. I suggest a global update to this feature: allow marking two points on the map to display the distance between them, similar to simple map programs. It would be extremely useful to know the distance between two cities or from a city to a specific object, without a hero. Of course, without considering pathfinding, flying, etc. Although this could also be added as an optional feature.