Why would SasuSaku be reborn if Rin commited suicide? don't see the link between the two.
And Kakashi's father commited suicide so it's not like he's a stranger in using it.
It was mostly a joke about the SasuSaku thing. I think it's a pretty angsty pairing.
But you can't hide its effects. I'm pretty sure that if Naruto was to henge into Sasuke he wouldn't be able to use Amaretsu or any of the other visual techniques.
And I guess your right. Though if both and Rin and the White Fang committed suicide, I would begin to think he was using that plot device a little too much.