Based on Irongron's recent poll, it's clear that the playerbase wants to see more quarters on the wilderness, and therefore I'm suggesting that the fort on the Trader's Route - that one between Cordor and the Arcane Tower - be turned into a guildhouse. Everything is already in place, it just needs an interior now.
As it is, it only serves as spawn point for a handful of Goblin NPCs who throw [redacted] on adventurers and travelers who walk the Route. It would be an awesome guildhouse, to be honest.