Saw this earlier on the subreddit, I am really looking forward to some people making their own gauntlet runs to focus on different things (having a a run aimed around teaching people how to move fast on flat ground like you see on Homestead would be really great for learning the movement system). I assume this kind of thing doesn't work online though, but considering people have gotten it to work to this degree, I won't be surprised if they find a way to share custom levels.
Edit: Woah, so glad to see that a few of the fine folks at Respawn followed the move to Resetera!