Alliances have been around since the cuesed sails update and haven't had any significant changes since despite them being problematic in a few ways
There's no incentive not to be in alliance as there's no risk and additional rewards, I personally think to make alliances less beneficial if you sell an item within an alliance your gold should be reduced instead of the current system where all allianced ships get a half the value of any sold item.
There should be a cap on how many ships can be in alliance, currently people are forcing alliance servers by getting ships to join their alliance and if they don't comply they're spawn trapped till they leave, personally I'd make the cap 2 ships at maximum per alliance this will also shut down the boosting servers.
Paid subscriptions for alliance servers are also another reason as to why alliances need a balance/ rework, yeah sure no one's being harmed by them paying for a boosted server but they're essentially playing in safer seas with more rewards and are essentially boosting levels and commendations that other players actually have to earn.
