Evolution did not come easy to even the most talented of races. In fact, the most talented races took the longest to evolve because their potential was simply too vast.
When one thought about the various races that fit these qualifications, Neurics didn't come to mind.
However, they were perhaps just as limited as dragons were. Only, their problems were less physical and more mental, which gave Atlas much more freedom to help them.
The five hundred years that completed the first millennia of Atlas' time being the Shinnim were filled with glory and splendor.
The most important change, of course, was the fact that there was no longer a single Neuric remaining. Every single member of their race was now an Igni Neuric, and every new member born was the same.