actually both seem to be a good idea, and can help the player strategize differently. Initially I would have thought showing the dice roll would be the best, but indicating the direction is a really nice idea too. Maybe the dice roll fits better visually. Maybe the enemies can preview two dice rolls at the same time, and you need to guess between the two and strategize? This way you get a little output randomness that could be fun? But I cannot say which one is the most cool. Best would be to playtest it :-)