Adding the ability to queue for Leviathan Gauntlet/Arena matches while we grind the overworld ensures that we can wait in queue for as long as needed to find a match WHILE STILL HAVING FUN!
Once a match is found, it will warn us for like 15 seconds and then pull us into the PvP match.
The reason this works well is that everything in Overworld is saved as soon as you do the action, and if you are pulled into a PvP match you can just resume your run where you left off.
This would make queuing for games painless, especially if you need 8 players for gauntlet and might need to wait a few mins.
Dota 2 Auto chess had millions of players, and sometimes you still had to wait 3-5 minutes for a match to fill the lobbies for full game of 8 people. This solves the waiting for queue problem for Illuvium players, and would likely make queuing for any game mode possible.