Heroes 5.5 WarGame Edition - Tactical Edition.

Then, perhaps, there won't be the Falmer-Hafad syndrome.:) At least partially...
However, such a function will significantly increase the load due to the delays required between disabling the trigger and making the interaction.

This mod implies rare transfers of an army between heroes, which will further reduce the load. By the way, if we ignore players with weak computers and don't care about the delays, we can use this moment for many new ideas (but the system requirements need to be increased in the real game :D).
If only this script existed. But there will be many more. Together, they will have an even stronger braking effect.