Teleportation is already rather cluttered, and this game will only grow so:
Im thinking of the enhancement +/- buttons that you can press here. We could have main categories, then you press the little + to expand the list and get specific locations.
EX:
The City:
-Houses:
--Phiarlan, kundarak, crafting hall etc.
-Stormreach Market
-Stormreach Harbor
Outposts:
-zawabi's refuge
-gianthold
-necropolis:
--upper necropolis
--lower necropolis
-ruins of threnal
Exotic Locals:
-sorrowdusk isle
-Restless Isles
-Meridia
-Portable Hole
in this way, even as new content is added, the teleport list does not simply omit all new content, or become so large as to be difficult to use
edit: in my opinion, this should be the list for both teleport and greater teleport, they are, after all, supposed to do the same thing, except one is mass