This thread is really out dated now considering all the milestones they implemented in Fortnite.
4.18-4.2 had HUGE changes to handling large amounts of characters on screens and the problems that comes with that.
I as well have been working on my own MMO with my own custom web server.
I have removed all non-crucial systems off my dedicated server and handle them through REST calls to my webserver.
My dedicated server only handles immediate inventory, character status, combat, and character movement.
Everything else like clans, social, item generation etc is handled on my RoR web server, even when a player drops an item from their inventory on the ground, that event and communication is then placed onto the webservers item awareness system and not the replication system from the UE4 dedicated server.
