R. Star wrote:
I always wondered why Tom didn't get promoted to Lieutenant Commander. That same episode said he was promoted for his bravery in that evacuation that created the double. So Tom did that every bit as much as Will.
I would think that Tom Riker's questionable grooming choices would disqualify him, but more broadly, a promotion in rank is not in itself a reward for courage (or any other display), but an assignment of new duties and responsibilities. Displays of courage figure would figure into a promotion, but presumably Riker would need to demonstrate that he can perform at a higher level, which might not be as easy after years in isolation.