Even after years I still don't understand why we can't switch realms in some places like Darkmoor (Graveyard) or Hall of Heroes. It's quite annoying to have to go outside of the area and then go back just to switch realms, it would be nice if this restriction could be removed from these locations.
Also, when attempting to go to a certain area within a realm, it's sometimes not possible to do so because it's already full, but there is still a 1 minute cooldown despite not changing area/realm after all. In this case the cooldown should be removed so that we don't have to wait unnecessarily to switch again.