Loved that video! Thanks for sharing.
The zone of control mechanic was born since I knew I wanted flanks/backstabs in the game, but without ZoC the most efficient play each turn (for both player and enemy) is just run behind the unit and backstab them. It wasn’t too interesting tactically, but putting ZoC in suddenly made it so you had to work the get the flanks off, had to plan a little in the turn before.
The Battle for Wesnoth is probably where I pulled the most inspiration of ZoC from that I can remember. It doesn’t work exactly the same, but they do have the “As soon as you enter an enemy ZoC you lose all your move”, but I also think that is pretty standard in games that have the mechanic.