I think that keeping Rikki around next season to help Danny slowly deal with his guilt over Ruben's death should be mandatory--I don't count on it, but I really think that her forgiveness and their shared grief would break through his guilt better than anybody else could do, friend, lover or otherwise. I don't think he'll ever believe it wasn't his fault, but I think he could forgive himself, given time. Even if they don't continue to have any kind of sexual or romantic relationship, I would dearly love to see them interact--it's probably bad, but I really think the 'what if' is intriguing with these two. What if Ruben hadn't died and they'd eventually gotten together and started a family? That hint of losing 'what might have been' would be just as interesting to watch (dramatically, not from a 'this is how i feel about real life' standpoint) as them actually being together now. In fact, I can see myself thinking in terms of '10 years down the road, they rediscover the spark they had all those years ago', you know? When they've grown and changed and the pain isn't so raw and hard to bear.