Both arenas get stale quickly and designing Rock / Papers / Scissors with the complexity and number of interactions between 173 character kits and 42 ships has to be a daunting task. If you just accept that one team will always generally "outperform" other teams and that the user community, with its relatively limitless resources, will find it then we can move onto a more interesting conversation.
We just need more stuff to do with ships. Add two more capital ships, expand ship zones in both TW and GA, and create a ship raid. I think a lot of us basically accept that arenas get stale quickly, but that doesn't mean there aren't things that can be provided to let us enjoy the content more.