Something I would like to see is to bring up NPC tier 2 characters when viewing missions (and the contacts page)... a Corporate faction could have man in a suit, the criminal faction some shady looking character, a military officer, a security officer, government officials... I can hardly tell the difference between the factions right now. Once your reputation increases, maybe you're introduced to higher level NPCs, like the President of a Faction or Head of Security for the System, with an increased difficulty of missions for that faction. Would love to see messages from friendly/allied factions when you dock, "Haven't seen you in a while", "Welcome back Commander", "We need your urgent help...".
The bulletin board needs much more variety and impact... adverts, propaganda from Powers, missions from commercial companies (fast food, banks, etc.), police (security) missions, crew vacancies, hooky gear, passenger missions, long haul missions, more internal system missions between stations, tourist sight-seeing, assassination missions in the same system, pirate missions (given a tip or manifest about a ship with a high valve of cargo), ship recuse missions, missions from individual NPCS (bring medicine to my family, help me escape the system, asking for money), and of course some progressive scripted missions.
The Bulletin Board and Missions are still in an early beta phase with no sign of an update in the near future... thought I would love to be surprised!