We've put out the latest newsletter, talking more about the extra missions we'll be adding (starting from the next large-ish update, the freeplay overhaul) and several other things. Go read!
https://steamcommunity.com/games/463530/announcements/detail/1606017470839832537
https://steamcommunity.com/games/463530/announcements/detail/1606017470839832537