I certainly like the idea, but Fast Food places don't really have to be similar, just because they have the same name. For example, in one of the bigger cities in my area, there are 2 McDonalds. In one of them, the people who work there always seem grumpy and unhappy, and most of the customers as well. The other one is quite the opposite, the employees are always smiling at you, seem to be genuinely happy most of the time and it is all in all a nicer place. In the nevernever, those places are probably pretty far away, though it is only 2 miles linear distance.
Another thing is a comment in White Night from Harry. During the battle in the deeps, when Cowl enters, Harry says that though both portals to the nevernever are very close (in fact, they are in the same cave, so the metaphysical capacity should be the same), they would probably not open to the same place in the nevernever, due to the different personalities and styles of magic he and Cowl use. That would mean, that not only the place, but what the place means to the person opening the portal means, plus their general state of mind. In this case, Harry said Thomas could find the place, because he was almost killed in the deeps, and with Harry being his brother and being there when it happened, it is only reasonable, that Harry would be able to open the gate to the same place Thomas would go.
Maybe it has something to do with the kind of power a place has. If the wizard is strong enough, he can imprint his vision onto the opening and have it open to where ever he wants. If not (which usually seems to be the case) he has to use the imprinted connection that has been formed over time. Cowl (and maybe the Gatekeeper on his way to Demonreach) would certainly be strong enough to do something like this, everyone else uses the usual routes.
