Long term / lifetime expansion pass / old players dont need more ships.
We need things to do with the ships we already have.
We need NPC's that are actually hard to kill and are hard to kill because they fly well, not because they totally cheat.
We need rewards that are scarce and not coming from an infinite well.
We need things to buy with our rewards that amount to more than just consumables used to acquire the rewards we just spent
We need achievements that scale with skill, not something determined by a fixed amount of credit values that have become destroyed by inflation.
We need ship balance so that we can't just rock 1 ship for everything
We need lots of things that make the game currently boring to us. If it doesn't address why you're bored now, then it wont make the game any less boring after.
If it's a matter of money to you, and not disappointment due to anything mentioned above, then my suggestion is 6 months no charge squadron use from the time of first creating a squadron. After that normal fees apply. whatever they may be. That would likely be something most players would find useful and worthwhile without providing any lasting pay-to-win advantage.