I have a different problem with the same event. It goes over my fleet limit, giving me 6/5 SM and AM fleets and the campaign crashes to the main menu.
Apparently the cause is that there arlready 3 fleets at one of the 3 systems in question.
Still, the campaign quits to main menu when there is more than the allowed number of fleets deployed.
Caliger is handling that, so far it seems for most races it is a small point decrease, except for the elves and tau where some ships cost a bit more.
It is still in flux, but there either will be a total rebalance with the mod, or a separate version with the new values.
So far, space marines have gotten one step better accuracy, which helps them out somewhat, especially Strike Cruisers and Battlebarges.
I do not think we can mod the campaign's internal structure at the moment. We also can't add stuff like another game's music, I'm sure that also breaks a lot of contracts and thus would be unsupported. You can however download it from youtube and play it with a music player in the background.
Caliger is focusing efforts on balancing, and the new ships will be mostly what we are trying to do currently.
The Neptune is yes, hopefully going to be added.
I don't think lightning strike needs a nerf.
What I could see is that most ships WOULDN'T have a teleportarium lore wise.
It is rare, and it would mostly be just placed on battleships, SM and AM ships.
But yeah, I would leave it alone.
I do think battleships need to be more protected from boarding and critical hits, but that's a different story.