Since we've had so many quality of life updates lately, I figured this would be a huge one that would be amazing for players:
Make loadouts have two drop-down categories, one called "Costume", one labeled "Loadout". Costumes would act as a loadout, but it would simply overwrite the player's costume items instead of every item.
From here, allow players to have an "overwrite" option in their loadout that will make the current loadout overwrite the one that is selected. This is to allow edits to loadouts without having to re-create the loadout and set it to the proper PvP setting.
Other nice QoL changes would be allowing for custom loadout categories, and allowing each category to toggle PvP so that players do not have to toggle potentially tens of loadouts if they want to play a lower lockdown or other future PvP game every time they want to.
I'd like to also see custom control loadouts cause some of us use different controls with different weapons for example I like using arrow movement with 2 swords in lockdown and use mouse movement for gunner or hybrid loadouts. I think this'd be best including in the regular loadouts rather than having other loadouts for only control themes. Just a QoL change that can save much time switching controls when switching playstyles especially in LD to surprise the opposite team.