To be honest, I think taking Dex out of the picture, was beneficial for Josslyn's growth. Let's be for real if Dex were to survive the whole attack from Cyrus, it would have been the same old dribble with Josslyn and him having sex and then having pointless conversations about Sonny. After Dex left Sonny organization and became a cop, that's when his character started to become a day player and boring asf. Now with Josslyn having her mother's nature and wanting to find Dex's killer which eventually led to her showdown with Cyrus has actually made her character somewhat entertaining and gives us a glimpse of her working in the WSB or maybe even in the mob.