I have sinned against the Borg.
I'm running a high level campaign using MB. Everyone started at level 1 but that was a few years ago and now they're about to hit 10. Last session they negotiated the creation of a new demi-plane to be their homebase. This involved getting a dozen gods, saints, and cosmic monsters to join their faction and donate power to the undertaking.
They are currently fighting psychic dinosaur gods on the moon. They have an extremely elaborate plan to reboot the universe and remove all the despair and nihilism from the setting. Only three Miseries have occured, because they're fighting Verhu in an oracular 5D chess battle. They get Grogh's priesthood to prophecy a cosmic event (like the creation of a new star) then make it happen themselves.
It feels like I'm running immortal level BECMI or Nobilis using Mork Borg, which is a crazy thing to attempt. All of my campaigns end up like this eventually, so maybe I just can't be trusted with rules light low fantasy games....? Has anyone else taken MB so far off the rails it transends its own genre and vibe?