Add skins like in the game RUST.
Would be nice to have skins for deployable, pods, wall paint and other decoration stuff.
You could do like the game Rust and have a workshop on steam where players can submit skins they do.
Sell skins to add funding to the game and to help cover more the development of the game.
Give out skins as twitch drops to keep players wanting to stream the game thus bringing more new players to the game. This is also a good way to bring back players to the game.
Rust (Facepunch) did understand this and made it work in a good way. Would be nice to have this in Icarus. This would also add more flavour to the game.