Same thing happened in HW. I play with my girlfriend and it's annoying having to go to the previous zone and walk through the zoneline to switch it to the right one if instance roulette puts us in different copies which is like most of the time. Once I'm in the right copy I can just use a teleport within the zone to cover more area faster. Zones that require using NPCs to enter or leave, you also can't choose the instance copy either which makes it even more annoying.

I'd rather it just keep players in parties together when zoning and move them to the lowest populated map of the three. If all the maps are full, default to the current behavior.