So it's about time that we finally meet Ganju's brother Kaien, and like expected, his take on Rukia murdering his brother is misunderstood. There is no way that Rukia would kill a fellow death god in cold blood without an explanation.
Although the episode was fairly dark, it just wasn't that enjoyable. Kaien seems like a fairly cool guy, but they killed him, along with his wife, way too early for the audience to get a really good feel for him. So basically it felt like a non important character was killed off and they made a bigger deal out of it than they should have. And like said before, this was a flashback episode. God knows how many flashbacks we already had so far in Bleach.