First Coat try for Peacock. Think it's a little too busy with everything together! lol.
Here's another idea. Actual peacocks only have that distinctive coloring in a few places. I'm not saying you should make a peacock pony, but it might be better to have the mixed colors in the mane and tail and maybe have the body be mostly blue with some green coming in around the belly. Just a thought.
Oh, but maybe keep the texture you already have for a jeweled set or something.
You don't have to (I didn't for my KP set 1 although I did for KP set 2) but people do use them on the foal so up to you
I can't remember if you said what program you are using? I'd love to see that with Iray metallic settings