In my first post in a very long time here, I've found an interesting document that someone may want to see from the UKPS. I occasionally read contents of this journal but not too often.
http://onlinelibrary...300033/abstract
A bit of research shows ferrates would probably be limited in application for a few reasons. One, they oxidize all the primary alcohols, which severely limits its application. I hesitate to think of what would happen if it came in contact with acetone by accident. Secondly, they suffer greater issues with water than perchlorates do.
But it looks - without having purchased the article, I admit - that they believe ferrates still have potential.