Since all armor, base weapons, runes, and whatnot can be bought from merchants in any city, there really isn't a need for an auction house in this game. People selling z-keys and mini pets seem to account for most of the traffic in trade channels. I guess a mini pet vendor might actually be useful.
This is the only 'MMO' I've stuck with too. Never raising the level cap and having the gameplay revolve around skills sets and tactics rather than farming is vital for me. I can go away for a couple months and return without being hopelessly out of date. Oh, no subscription too.