All these ambitious ideas being tossed around is fine and all, but what's the actual scope Muse is aiming for? Are we talking about simple co-op humans versus AI planes matches, a singleplayer/co-op campaign, persistent instanced MMO? How much is this going to detract from the current multiplayer, is this going to be considered the new focus or simply a bonus for those that get tired of 0-5 losses?
That's exactly why I wonder if the Freelancer gameplay model wouldn't be the best way to work it - the whole game was pretty much played from your ship in vast open areas (space) - everything else was some combo of a static camera and a nice menu.
Every time I look at the Kickstarter page, I realise Muse must seriously have a budget to keep in consideration. There's no reason you cant have simple, yet deep & enriching gameplay features so long as you approach things in an inventive & thoughtful manner. I mean, the money ArenaNet must have blown to get voice acting added everywhere must have been insane, yet players seem perfectly content to pick up books in Elder Scrolls and read them silently too.
We all obviously wouldn't be here if we didn't think GoIO was special. So long as Muse keeps focusing on the Art, World, and Ships (~Steeeeampuuunk~), whatever they come up with can only add to the current game we are all enjoying.