Most importantly is taunt. Robots (or structures!) with taunt should be very obvious when looking at the game board. This effect will greatly affect your tactics, so you want to be able to see it immediately rather than remember it.

Other effects should have some symbol on the robot indicating that you should hover over it to see what the robot can do. It is possible some very important effects will need visual cues like taunt. It is also possible AOE effects can color the adjacent hexagons (possibly with some fade-in and fade-out visual cue)