I hate to be another person to say "bring back an xi feature"

But it would be great to have a custom simple map marker system such as xi's.

Example: Limsa Lominsa - there are so many caves and certain mobs only spawn in specific locations. It's a little difficult to just mentally keep them in order.

In said previous game for the ill informed, you could use your joystick / mouse, click on a spot on the map, and give it a limited character name/codename to help you remember areas / zones / etc..