Hello all from Spain.
Now, if you want several 3d views with the same orientation, you have to duplicate them (note that its not possible duplicate a 3d vies as dependent).
As every change in the point of view or orientation of a 3d view is only done in it, then is necessary to re-duplicate all the views.
It would be useful a tool to assign an orientation or point of view from a 3d View to other ones.
An alternative to this could be the ability to do dependent 3d views, but I suppose that this would be not so good.
Regards.