Pirate Upper/Universe Limits
Imagine if you will, somebody has 200,000 credits lying around and opts to just spend them all on a single, massive, pirate mission. What does one get? They get a pirate fleet with a supply limit of 5000. Not only is this almost impossible to fight against - It's also impossible to get your game to run after they jump in.
I crashed the game my friend and I were playing by sending in this ridiculous fleet of ships. Not only can this be used as an exploit to crash lesser performing systems in an online game, pirates left over start to lag the universe as a whole.
There needs to be an upper limit for pirates both on mission offers and on a global scale. I know this might be against the end goal of Diplomacy, but it must be addressed for stability/balance sake.