For people that are complaining there isn't enough room, that's partially our fault. We all choose to cram our retainers into Ul'dah.
Which is why? Maybe the underlying mechanics are at fault?

With all the efforts they have put into it so for, I doubt they will get rid of it.
...ironically, the same could be said about current players.

But on a more serious note: What can retainers do that wouldn't be achieveable with a AH? Twitch?