Zone Transition?

[Korbei]

I would have to disagree with you and say that the problem is everywhere.

You make good points. However if the mountain range idea is implemented around all of the Black Shroud, that solves the issue for Black Shroud/Mor Dhona and Black Shroud/Coerthas.

Then you need to devise another way to deal with Thanalan/Mor Dhona and Mor Dhona/Coerthas.

I think the original idea remains simple and effectual.