I would prefer that the Hyperion Shrinker would be planet specific rather than empire wide. It would emphasize its importance and limit the ability to do what Unleashed elf was able to do. A 195 hitpoint ship with 1500 logistics points, wow! So every ship he is building is a game breaker. It would be more fair if the special ship came from only one planet. Then players would be inclined to design specially designed Super Capitals, true Dreadnoughts. True leader ships for the each fleet.
it wouldent actually prevent anyone from building these kind of ships i could funnel the extra mass capacity all to a single shipyard so i could still pump out supermassive ships although not from every shipyard unless you hard limit the hyperion shrinker to one per civilization i can see several ways of overcoming this
1) start building multiple HS one the same turn ( currently a bug i expect to see fixed)
2) trade for planets that have a HS
3) invade planets that have a HS
4) trade your planets that dont have a HS but are set up so the ai would logically build a HS
also unless you are hard limiting the HS now you create a bit of a micro problem i now need a copy of each ship for each planet that has a different level of HS