Rosita needs more development. She is the only female character that hasn't gotten an arc or part of an episode.
Sasha's development has been great but I question her characters future because
I hope we get to see some Abraham kickass moment in the finale and Michone picking up her sword again.
I also like how the group lets out some steam against the walkers. Rick & Carl by the house, Abraham in the construction site and the girls in the last episode. Sasha seems to have the right idea. Hunt walkers until there is no more.