It solves #1 as well because the Lemmy-phile/end user is already apart of an instance that would federate with the game instance.
Administration is taken on by the game company for their own instance, so updating and technical, server side stuff isnt a worry for the end user. As far as the instance owner, its no more difficult to keep updated as it is for other instances. If anything it would be easier because only the devs and company folks would be users of the instance itself so an update doesn’t impact their user base directly, there might just be a pause in new content while it was updating