Hi! I genuinely had fun playing the Super Brawl "1v1" gamemode with a friend on the weekend because we could face off each other without having to deal with random people griefing our duels. I honestly thought it was a permament change but I realized it was a temporary weekend thing, just like with the "No Autotarget weekend".
I propose, for the sake of decluttering the UI with "useless" gamemodes, keep the "Untiered" (costume-allowed) gamemode but replace the "Tiered" (costume not allowed) gamemode with the "1v1" gamemode.