In GalCiv I, the anomalies were quite useless, and mostly, they only benefited the one ship that found them (e.g. +1 weapons), but as the game progressed, and much more powerful ships became available, such improvements were useless.
It would be nice in GalCiv II if one could explore anomolies that would improve on existing research. For example, "After researching the wreckage of an ancient ship that had powerful weapons, you now have Laser II".