Also if the duel servers were made public like auto-tourneys and players
could no longer have control of the server like in private ones then there
would be a significantly less amount of duel scams, duels traps, and other
problems related to an abusive op in a private server.

Going with my general outline will help out the community, promote dueling
for newer players at and early stage, support the already standing dueling
community more, provide a safer environment for dueling, and lighten the
load of staff's work by decreasing reports about dueling related problesm,
aka scams, trapping, etc...