1) not useless compared to custom tools (so it would not render useless at all)
2) having some logic and not destroing ingame immersion right away like custom tools do.
In other words im not aiming to "rule them all not matter what" and map/kill asap everything you can reach ... but more about some ingame mapping/orientation convinience still being logic from the point of game and require skills/time ingame.
Probably something like old Cartography skill - but with more detailed maps letting you place marks / QL zones with proper skills ? I mean maps being actually usefull and not just for being there - also an option to decor house walls
