During the lvl 4 quest Spy Effect's we can use Canyon as a bypass between squares but that is the only time we can. Why not all the time? Would save time and make it a bit easier. Whether or not this could be revoked during a war (since that would be a great help) could be debated but having the ability to do it anytime besides war would be nice. The argument could also be made that since you can use it as a bypass for the lvl 4 quest people would expect to be able to use it as a bypass all the time.