They had this in 2042 too where one of the, for lack of better terms, operators would passively spot an enemy if he was shot by them. I think a good compromise would be that passive spots would reveal their location on the mini-map but not in the actual game's UI if that makes sense. Not sure if I articulated that well but essentially it would require more game sense and map awareness because plenty of folks don't pay attention to the minimap. The only issue I see with this is how ineffective it would be during Hardcore where the HUD is completely removed. However that wouldn't be the only ability affected by loss of HUD (Recon's UAV)
In 2042 that spotting ability is pointless in regular games cause you don't share it with anyone, just a point maker. In hardcore mode is very helpful as it places a deem red chevron over the enemies spotted so you have to be really looking for it or you might miss it. Worst case scenario they need to deem those red dots (a lot)
Still though I like your idea of only showing on the mini map (not sure if i would prefer a steady or blinking red dot). i hope they bring back the option to change the zoom option on the mini map. As for hard core mode, a very deem marker would do (if you are hiding in bushes you shouldn't be able to see the markers at all) hopefully that would take care of cheap shot.
