I don't really miss Rocket either, considering the fact that we don't even know her character at all... Just saying it was sort of a contrived addition to the team in the first place... why bother putting her on for just two episodes? Just to have Aqualad have someone to kiss during new years? Or *gasp* be the diversity hire?
It's been confirmed on world's finest/toonzone that sometime in the second season there will be some kind of development on Zatanna relating to Dr.Fate/Zatara. Not sure if she'll get much spotlight past that though.