I, upon conception of the idea of the embodiment of anarchy, had conceived embodiments as the aspects in a body, as the name embodiment suggests, not someone with control over the element in question. Though embodiments would have complete control over their element, but this is because they ARE the element. Yes, this is godmoding, but there were only supposed to be a few embodiments for plot purpose. It's okay for them to be godmoding-potential, as long as you don't godmode with them.
On the manner of successors, I also intended, as conceived on CE with Fatet, for the 'spirit' or rather 'essence' of the embodiment to always live on, even after death. The very shell of their essence would merge with the spirit of their successor, thus bonding with it and making their successor an embodiment. Fatet is a rare case in this idea, though. Fatet actually, in a battle with X (perhaps the embodiment of anarchy), placed the very shell of his essence inside his disciples (the brown cloaked men) despite their unawareness, as well as on Magimeta (because he knew someday it's properties would be effected by the black hole's time dilation field) and in whoever he chose to be his successor. It'll be upon whoever he chose to be his successor's coming into contact with the brown-cloaks on Magimeta that whoever he chose WILL BECOME Fatet.