That monitor seems to dynamically do things based on data the game legitimately shows a player.
For some data, like the health bars, a skill / accessibility leveling feature might be to just let the user pick HOW the game displays that data, to customize the UI layout to their needs.
Enemy position highlight based on the minimap vs present location? Yeah, that crosses a clear line, but it's abusing some data the game probably shouldn't have told the player to begin with. What if the minimap reflected the known shape of the world, but only updated with the visible area (standard 'fog of war' mechanic)? Again, it might be within accessibility features to highlight enemies within sight, so I don't see too much issue if the minimap's render state is restricted to the immediate area + what the camera direction could see.
There is a fog-of-war mechanic, called 'vision'. In the game discussed in the monitor article (League of Legends), what is shown on the minimap is restricted to what your team can see at that moment.
The monitor is akin to having an experienced coach watch you play live. Is that also cheating? I think it is.
I also think it's impossible to detect, unless the player suddenly becomes extremely much better at the game. That's the best they can do to catch cheaters at chess. But chess is orders of magnitude easier to monitor, because the game state and input are small and simple.
When I first read about the monitor I realized that for many types of games cheating will become unstoppable. Although sad, the bright side is that it drove me away from online gaming even more, to the benefit of my overall health.
For some data, like the health bars, a skill / accessibility leveling feature might be to just let the user pick HOW the game displays that data, to customize the UI layout to their needs.
Enemy position highlight based on the minimap vs present location? Yeah, that crosses a clear line, but it's abusing some data the game probably shouldn't have told the player to begin with. What if the minimap reflected the known shape of the world, but only updated with the visible area (standard 'fog of war' mechanic)? Again, it might be within accessibility features to highlight enemies within sight, so I don't see too much issue if the minimap's render state is restricted to the immediate area + what the camera direction could see.