The idea of Hyper Duels is great and i'd like to see it staying in the game.
As much as i'd liked it to replace the current duel system this will probably not be a thing but still, it just feels more like a duel than the regular as you have to watch your health as well. Still, a second duel playlist added should also work, kinda like the deathmatch, where you can prefer either skirmish or elimination but you can actually choose what to search for only and not add a preference. It will be important to menntion it so everyoneill see a message, when first trying to start a duel, so the gamemode isn't dying right of the bat.