the gate new and gate location commands are very similar. Maybe it's a good idea to combine both into one gate set command. This command would just set the location of a gate regardless of whether it exists already or not.

But what happens if someone wants to create new gate with an already existing id by accident? Will the location of a gate simply be overwritten when calling gate set? There should be some sort of a warning and/or interaction with the player preventing changing the location of a gate with no way back! But then we would either need an undo mechanism or an annoying »Do you really want to change the location…« question when executing gate set.

I would vote against such a feature.