If possible (and if you think it will get popular at all), is making a sub-mode of team eggwars where parties are treated like non-party members (ex. party member 1 and member 2 will not be on the same team unless randomly assigned). The reason why I'm thinking of this is that usually, the ranked players are usually all on the same team, and the non-ranked players are always trying to team select with the ranked players, making a large skill gap.
Or there could be a game mode where only non-ranked players can join the game and ranked players can join another game.
Or there could be a game mode where only non-ranked players can join the game and ranked players can join another game.