Welcome to the forums. I'd say the cruiserweight and light middle could do with fresh blood. There's some good fights to be made at middle.
I.....partially agree. I think Canelo, Ryder and Plant are finished when it comes to pushing the division forward from here on out and that the next generation to take up the mantle might now be Mungia, Morrell and Benavidez. Benavidez and Morrel in particular remind me of Hearns and Hagler when it comes to tenacity and willingness to finish the opponent with aggression. I'm looking forward to seeing how all 3 of the new guys progress.