I think the episode would have had more punch if Tank's situation was bit more permanent. It's like Wolverine told Spider-Man in the Fallen Son miniseries:



Wolverine: You want to know why it's called depression? Because it IS depressing. Death isn't like losing a job or getting a divorce. You never "get over it." You have to learn to live with it. To incorporate it into your life. But eventually it DOES get better.



Spider-Man: Someday?



Wolverine: Best you can hope for.



I mean, Rainbow hasn't really lost Tank, just temporarily separated from him, so her going through a grieving cycle is kind of melodramatic.