u/Shibeuz

This idea is primarly focused on DMZ, but I think it would be great for them to add a system similar to the Music Player from Black Ops : Cold War, which allowed you to make a playlist of in-game tracks (either unlocked by collecting cassettes in Outbreak, battle pass or by playing the campaign)

Obviously, there would be some changes needed to fit the theme, maybe you could find them as very rare "additional" rewards from contracts or as loot (plus the ones from the campaign) and maybe you could have a boombox at the FOB, to play while you stock up on ammo, play around with attachments, craft stuff with the 3D printer etc.

Alternatively, they could copy Metal Gear Solid V and create the "infil/exfil playlist" that plays your chosen songs from vehicles when arriving or leaving DMZ. Imagine how badass it would be to escape with the skyhook while this plays (on that idea, they could bring back the best tracks from all the MW games as rewards, battle pass items or bundles, I guess some people would pay for it but I prefer the majority of them being earnable)