I noticed this too unfortunately. So I just stuck my retainer in Limsa -- we shall see how that goes, lol. I remember many months ago I could leave my retainer in any city's market, and I could find stuff I needed in any city as well. So I find it kind of funny that overcrowded wards (but not dens or rows!) are an issue now.

The wards resetting ever so often and/or booting retainers after a certain amount of time could be a good thing, I think. What annoyed me so much was that the resets were random so you never knew when your retainer would need to be summoned again.