The places I'd found online stated that the Archaeologist's Map could teleport you to any city in the game and back, but after assembling it I found it's basically just a normal map with a return function. Was there a nerf at some point, or were people just inaccurate in how they portrayed it?

It was not nerfed, it was always like this.

The difference between a normal map and the Archaeologist's Map is, it's permanent and has a return function. Nothing more, nothing less.

Much obliged, thank you for the clarification.

Outdated treasor.

some players say we can tp to any city because they could not imagine how this treasure is useless and believed what they said..

Imagine a treasor with 4 parts but you have a very big CD and have just a "return" fonction 

The "permanent" fonction is useless for 5 years now.. 

Compare this treasure to infinite pot and you can see why this treasure is completly outdated.