Add a survey on players map preferences and use the data from each persons survey to slightly alter the maps they get put on so they can fit people’s interests better.
Super long version/explanation here:
I’d recommend expanding the Arcade or putting in another category that doesn’t give lootboxes and testing how different items play out. For example, the most popular map in the game is King’s Row. People play it like 5% of the time. Might it be fun for people once a month or so to be able to play King’s Row all day on an Arcade tile?
2CP is probably the most controversial map type. I’m curious if part of the frustration in 2CP is that your teammates are potentially bad at 2CP. If you gave 2CP a tile in the arcade I’m curious if people might enjoy it more. (If said tile attracts a sufficient population you might test turning 2CP off in other modes for a week and adding a competitive 2CP tile as well)