...or, is that too... free-form and complicated? I come from the 2e days, so yeah. I think I'm just gauging interest in the "setting" here on RPOL.

Are there any Planescape fans out there, or players looking for a plane-hopping adventure?

Oh there's at least one other planescape fan out here.  Unfortunately, real life would get in the way of GMing at this time.  I'd be interested as a player.