I am not sure I understand the intent of "a much needed upgrade for all of the ships in your fleet." It seems to be directed to all ships in your empire, after all, who would combine a survey ship with other ships into a fleet during the early part of the game, when you are not at war with anyone? If a lone survey ship or a survey ship "fleeted" with other ships are the only ones to get the upgrade, then at least the sentence makes sense consistent with the results, but if an enhancement is learned from an anomaly, doesn't it make sense that the entire empire learns how to apply the enhancement to all of its ships?