I would love to see a service (subscription or otherwise) where we can have private servers, primarily for co-op, so we can have games with just our friends so we can have a more immersive experience.
Would also be very awesome to see this service allow for custom options such as higher/lower enemy resistance to tailor to how many people you have online, and removing certain maps/scenarios from the post-game voting rotation, like if you don't want to play night scenarios, you can remove those and only play day and vice versa.
I'd definitely be willing to pay for this; would be akin to Battlefield 4 server renting, or Minecraft's Realms service, and would drastically improve the play quality of the game, and it's already really fun.
