The only problem with this, though, is that unless you just want the campaign to involve one VSD, one Corvette, and one Neb B Frigate, then you'd have to purchase this pack AND several others. Many potential players would hate it, even if it's understandable. There's simply not enough ships in the Core to make for an adequate campaign.
So in the end, if FFG would do this, it would likely be a free download, and since they can't make money off it, they'd wait until they have some spare time.
It would not be a problem to have only limited amount of ships. You just buy your fleets based on the plastic you have. One scenario in the campaign would only consist of ships you have.
Would FFG make money of this? Yes they would: by supplying components that one would not buy when just playing the tournaments, as transport vessels, star docks etc.
Every miniature game I have played could benefit from what you are saying and every one I have played (Which is lots) all want more Narrative.
SO then one company decided lets ease up on the awesome rules we have, and create a narrative for the players.
BIGGEST MISTAKE THEY DID.
You can create your own narrative let them create the tight balanced rules.
Who are you talking about?
Games workshop had some very good rules, but instead they decided to "Forge the Narrative" and the games rules have gone way down hill, all my friends got out of the game to get into Warmachine.