I am wondering the same thing, It has been extremely hard to find any info on this. It is easy enough to get some info on how to do it for Halo 2 Vista back in the day but I assume that does not work now that the online goes through the network tab. I am wondering if they want to keep dedicated server creation just for admins of Project Cartographer, which is cool so there aren't a 100 dedicated servers I suppose.
I would like to see better game variation and old school long spawn times to make the game more competitive. What changes were you hoping to make with your dedicated server playlist?