What about icons and colors? Concept: thought bubble, yellow; Revise: pen and paper?, orange; Playtest: dice, green; Official: star, blue.
Maybe stuff from http://thenounproject.com
I myself would use colours sparsely to avoid a circus or clutter/distraction effect. For that very reason I only used white for the edit "button" (seen only by admins etc and card author)
It could be worth testing
out icons I guess. Whats hard with icons is that its sometimes very hard to find or create good ones that actually have a logical connection to what they symbolize. So, most often, and for that reason, I tend to not use icons myself.
Give it a shot though. Some straight forward ideas: Eye for INFO, Scissors or Hand for EDIT, X-mark for DELETE, ! or whatever for REPORT. Scroll, ancient pillar or eye for HISTORY etc...
Just keep in mind one thing: Having plenty of icons makes the counter-productive. I think their usage should be minimal, and that we shouldn't have a unique icon for every thinkable clickable link in CS... that would be a pure disaster. Only stuff that is often used should have icons, if anything.
Edit: good site btw
Love that its PD & SVG