That's what needs to be added. A way to prevent players from joining or sending an application if they don't meet the required power level.
If I'm playing a 2020 matchmaking game I don't need you showing up or sending an application with a 1990 power level.
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In most activities they'll be brought up to -5 of the highest in the lobby, there are very few activities that don't do this. But I mean sure, more options the better.