Easy!
-A new market system wich is purely player driven, building around crafting. You can buy and sell materials what u can use to craft modules and weapons, even smaller fighters(what u can launch from bigger ships)
-Implementing job system, so you can be:
- a cop, where you report to your commanding officer and accept daily missions wich are a little bit more engaging then the current ones. With lvl2 and 3 caracters, so you can actually have an impact on the criminal society in a given system.
-a pirate in an actual organization where your succes have an impact on the current place of the criminal organization in the system, you could actually whatch your beloved gang blowing up and wiped out by the police(like other people or sg)
-be a smuggler, but instead of the current system, we should actually smuggle ourselfes into the station, not jut requesting permission to dock like everybody else. There should be randomly generated smuggle tunnels to every station which are risky to enter and u need to be a skilled pilot to go trough. There could be drones in the tunnel, so u should need to be under 2% heat all the time, couse they will sense you and attack. I would even implement a new hull composite what helps u hide from the radar. And most importantly fixing the npc's so they cant see you if u are not on the radar!
-If we already have multicrew ships we could refthink mining as well, so we actually need to scan the asteroid so we could see what kind of metal and where it is in the asteroid. There would be different mining accessories and you could change the heat output of the mining laser. You obviously mine ice, metal, gold, and titanium with different tempriture. You could use bombs what u need to precisely place/shoot to the asteroid after scanning, so you could break it into more but managable peaces. Maybe the core of the asteroid contains the usefull materials and you want to mine that, but instead of lasers you brake the asteroid into 4 peaces so you can mine it more easily. With it obviously we need asteroids that can be damaged, mindes, blowing up etc.
-I think beeing a racer is an easily implementable profession
-I'd love to see a scientist where you need to explore planets and gather samples, but the whole exploration mechanic need a whole rewamp for it, and honestly I just know it needs one but I don't know what would be good.
-If there are professions, a player driven echonomy, and multicrew ships, why not creating a few larger carrier, ships that can be used as an alternative of player driven stations. There could be 3 type of it, a large scavanger ship, that can effectivly scavange ship wrecks for materials and ultimately useable as a "small" factory to craft basicly anything in the game. The other one could be a large miner ships, where you can use the mined materials to create raw materials for crafting. The last one should be a trading port, where large ships can land and trade with you.
-Player driven factions, with player given missions!
In nutshell I'd love to see that season 3 is actually focusing on makeing the static BSG into a living player driven simulation.