Robert Maxwell wrote:
Wasn't she a Lieutenant Commander at that point? In other words, she may have been the most qualified and trained person on the bridge for that job, apart from Riker himself, who was too busy being in command.
Otherwise, I dunno, maybe they just wanted her actually doing something useful instead of sitting next to him, saying, "I feel great fear!"
Full Commander. Remma, Troi told Data to call her sir