I'd be willing to bet Tynan got some plans for it, but it probably won't be a priority for a while. It's like how it's with Dwarf Fortress, despite many many years of development, outside having a map where you can place several colonies at - which is also the only use it has now in Rimworld - it has yet to have any direct use in fortress mode. In the future Dwarf Fortress will allow you to send armies across the map, so we can only speculate if Rimworld will end up having something similar.
One thing Dwarf Fortress does have though is map features that affect your fortress if you place it too close to it. That's not heavily used in DF though, but could be a more cheap way of spicing up the map in the short term for Rimworld. For starts, the distance between the colony and other factions could determine raid/visiting rate, and also if non-pirate factions would be hostile or not (like if you are too close to their territory). But yeah, my point is, the map isn't as useless as it might seem initially, there's a lot Tynan can do with it down the road.
One thing Dwarf Fortress does have though is map features that affect your fortress if you place it too close to it. That's not heavily used in DF though, but could be a more cheap way of spicing up the map in the short term for Rimworld. For starts, the distance between the colony and other factions could determine raid/visiting rate, and also if non-pirate factions would be hostile or not (like if you are too close to their territory). But yeah, my point is, the map isn't as useless as it might seem initially, there's a lot Tynan can do with it down the road.