I don't have a good answer for that. It depends on how much you want to be involved. I'm not that familiar with tagging areas that are abandoned and under construction, but do know that some tags exist to indicate that. You should check https://wiki.openstreetmap.org and see what you can find there. If you don't take care of it yourself, I'm sure someone will redraw it eventually. That's the joy of mapping in an ever-changing world.