So two ideas I had first that I think would be nice is for an alert sound to play in game lobbys when enough captains ready up for the countdown until the match starts. I don't know if it's just me but I tend to find that 30 secend countdown catching my unaware.
The other idea was what if you could set tar clouds on fire? Like with flamethrowers and flare guns or something that goes boom like flaks if you can get the range right for them to blow up in the cloud, And ships that past through the fireball would catch on fire. would be interesting with ships like squids that have a back gun nobody ever uses that they could put a flamethrower to light the cloud on fire.
While the idea of setting tar clouds on fire sounds cool to me I don't really know how that would work out in balance. (or if you can even set tar and tar clouds on fire in real life really)