I'm not sure I'm in a position to say if it's better to have east-west or north-south, but definitely increasing interties between provinces is something that makes sense technically. In the end, I guess it's a decision based on economics for the jurisdictions. Right now there's a study looking at the North American context to see, with future production and so on, how and where the interconnections should be improved.
I don't have a good answer on that, but I guess the Canadian study on that would also be useful.