....with the exception of this "reversing actions" issue.
Now the rules there are just plain badly written, where the difference between the icons is barely explained rather than laid out in the explicit detail required. And unfortunately reading the rules forums here made it worse, as the subtlety gets all confused with Panic Die vs Player Action, and Spirit of the Rules vs Letter of the Rules.
I haven't read any discussion here, but the rules are perfectly clear on this in my opinion.
If the icon has the slash symbol, you can never just undo the move of the previous player.
"You cannot use the same action as the previous player to simply reverse that action."
If the icon has the multi-colour symbol, you normally can't undo the move of the previous player unless the die was just rolled.
"You cannot use the same action as the previous player to simply reverse that action. You are allowed to reverse the action if a sheep panic roll affected the flock immediately before your turn."