I've been playing this game for a long time, but I wasn't aware of the restrictor at the beginning. At that time, the Leviathans were bugged. Since I discovered the restrictors, I've been using them everywhere. I cover the map with restrictors and set up my evacuations. I find that this tool is way too powerful and covers a larger area than expected.
I think it could be improved while also being nerfed. It would be more logical and realistic to have to place, for example, four of them in different locations within an area, which would then form a medium-sized restricted zone when connected. The electric discharge could be reduced, but the initial cost should remain the same, requiring multiple restrictors in different locations to make the game slightly more challenging.