For Jailor
1. Replace the Sun Icon with a icon with the word JAIL in bold letters. This points it out to new players that it is how you jail.
2. Add bars over the targets background, a nice thematic change letting you know your in jail.
3. No Jailing the same person twice in a row. Aka, Jailing John n1 and n2. Instead he would Jail John n1 but wouldn't be able to n2 but would be able to n3.
4. Have a execute icon instead of a player list icon. Say in the middle of the page put this message with a "Execute?" with the question mark. It's easier too see and is easier to click on.
For Mayor
1. Replace the sun icon with a icon with the word REVEAL. Same as above.
2. Give a confirmation window saying "Are you sure you want to reveal?"
For Pirate
1. Replace the sun icon with a icon with the word "PLUNDER".
2. A small animation of you swinging/shooting/stabbing at your opponent. Just a nice change.
For all Neutral Killing
1. Remove Witch/CL control, aka give control immunity, "Someone attempted to control you but you were immune!"
That's about it. The NK change removes one of the causes of insta losses.