Not sure about her thoughts on killing either, but I’m pretty sure Bombshell rejoined the Titans in a way similar to Rose’s: father issues, nowhere to go, allowed to stay at Titans Tower and make up for being a traitor. Bombshell seems almost like Ravager 2.0, but so far, not much fanservice. (Probably also why she’s mot as popular and why I’d prefer her over Rose)
*Because that rematch sounds awesome and that DC big wigs seem to favor Rose over Cass we won't get it*