I had an idea for a new game mode and this seemed like as good a place to put it as any. Don't know if it's been suggested before, but here it is anyway-
So, both teams start with a pool of resources. When you die and respawn, it comes at the cost of those resources. Different ships could cost different amounts of resources to respawn. If you really want to get complicated, you could also make each weapon type have a different resource cost as well.
The goal is to deplete the enemy's resources by killing them til they can no longer respawn. In the case where the resource cost to respawn is greater than the number of resources left, the ship does respawn, but the resource count is moved to zero and their team can no longer respawn. It's to avoid the awkward situation where your team still has resources, but you lose anyway. One team wins when the enemy has no ships on the field and they can't spawn another.
This could be combined with capture points that slowly provide additional resources when captured. You'll still need to kill the enemy til they can't respawn, but that would be pretty awkward with the respawn rule above. So alternatively, you could make it so that you simply can't respawn unless your team has enough resources. It's not awkward when the number is gradually increasing. One team wins when the enemy has no ships on the field and they can't spawn another.
The point of resource costs is to give the devs additional tools for balance. Right now, the Squid isn't very useful in a death match, but what if it were cheap and had cheap weapons? You could afford to make a particular hull or weapon outright better than others if you give it a higher resource cost.
If it's at all possible, you could also allow the captains to choose a new ship and loadout every time they die. Could make more strategic use of resources that way.
EDIT: Just rearranged 4th and 5th paragraphs. Also, if you think this is too off-topic, you can separate it into its own topic.
EDIT 2: You could also choose to make better/worse tiers of engines, hull, armor, or balloons if you give them higher/lower resource costs. Obviously that would require a lot more extra work, but the gamemode makes it a possibility for future updates. Could come with unwanted extra complexity, so up to you to decide what to do with this idea.