An old artefact/machine/small neutral blimp in the middle of the map, let's call it the Bacon...
Each team has it's Score Area.
If the Bacon reachs a Score Area of a team that team gets the point.
The Bacon is something small, floating without any movement by itself.
The Bacon can be moved with impact damage, ramming, pushing, etc.
And of course you can use harpoons for towlines!
Is the approach complete nonesene or is it worth thinking about it for more concrete ideas?