I posted about this before.
Krynn Prolific ability - I think this ability is too powerful, especially combine with the + 25% growth race trait the Krynn already gets. In most of my games on large maps, on turn 50-75 colony phase just ended. The Krynn have about 110 population, everyone else has around 25, second place in population is the Yor who have about 35. This ability reminds me of the "Super Breeder" super ability the Torians had in GC2 which always made them super strong.
Purpose changes to Prolific ability - "Planets start with 50% more population than is brought on the Colony ship"