When I updated them in my last SIDs Report I went a bit middle ground. I used their original write-ups but did incorporate some into their background. For Diamond I gave two versions one old school and one changed into diamond form
I've decide that the next issue of FE will be in Oct and will be a Halloween issue. In Feb. will be a Valentine's issue. So I'm gonna move around the orde of villains being upgraded from the list given earlier here