Backtracking is a strategy that you can decide to use but the game does not require you to backtrack. That said, I am thinking about some way to cover larger distances but as it's not a necessity to have it in the game, I will add it only if there will be enough time. The ideas are underground transport, drop capsules (just like the ones that enemies use), special corridors/passages. Currently, the character is a human but if it was a robot, I'd consider dismantling and assembling in a different location. And most likely it would be possible only to travel to places you either have been to or you learn about them by other means.