Well, there actually is a button to make the NPCs stand out and easy clickable for you. It's right next to the T on your keyboard (Y/Z, depending on your nation)
Printable View
While holding the button it makes all the other player not clickable and hide their names, so you only see the names of the NPCs (also interactive spots or objects) and you can only click on those. It's also very usefull on other crowded areas like at the retainer bells.
It's X on keyboards. It hides all player and minion names making NPCs and quest objectives the only clickable objects.
Edit: The keybind for it, in case you changed or deleted it, is found under the System tab and is called "Target Filters."
No Limsa hardly gets anything so it needs it honestly....
Also Ul'dah has almost everything in it ... the other two citys every event is held in most stuff story wise flat out avoids Limsa outside a few parts.. its really a highly under used city for stuff/unlocks lol
Ul'dah...is in the middle of a desert.