Map Marking vs. 'Q' Marker: A Request
Right now, when you press "Q" on a given area, you can mark the spot. However, it's more-or-less useless as no one really uses it to move to that location. What's worse is that it sometimes gets in the way of what you're trying to see - if there's an enemy right there, hitting Q will only obscure the target. That said, it can be helpful if you're say a sniper and you want to know the distance to a given spot.
Regardless, it would be far better to mark a location on the map. Said location can be marked on the deploy screen and a marker can be placed. This marker can be seen on the mini and full map. It's useful if we want to mark targets for squad mates, or as a pilot to pinpoint enemy positions (e.g. AA, objectives). This is especially important for pilots because it's difficult to see targets, and one can only really see the objectives if it's marked by the squad leader. IRL, pilots and foot soldiers had physical maps that they could mark, and this would play a similar role.
Please consider adding the map marking feature. Having the option to disable the "Q" marker would be nice, too, as I only really use Q for either the commo rose or spotting in previous BF titles.
