I'm confident that this is just temporary, there are a whole lot of core users who own most/all of the tables and would just want to buy the new modern Sterns (myself included).
A possible workaround, if cross-purchasing was working, would be to buy the individual tables in SPA and let cross purchase add them to TPA. I read in another thread, though, that this is not working - not a big surprise.
I did boot up the trial versions of Star Trek, AC/DC and Mustang on my Pixel XL, and all three played and looked fantastic, better in fact than Ghostbusters.
The packs are the same price as buying the included stern tables separately
For example ac dc and star trek are $10 each and the pack is $20
Little off if you already have ghostbusters and just want mustang...