This is from a post from October of 2013. "We discussed your feedback about the design of the egi with the development team. As was mentioned previously during the Beta test, the design planner reiterated that egi were designed to be a manifestation of a percentage of power taken from the primals and are intentionally designed to appear differently from the primal. As such, we aren't planning on changing the look of egi at higher levels.

We will however continue to take in your feedback when creating new egi that will be added in the future."

Now that being said. I suppose it's possible that they could have changed their minds. This was a few months after release.