I loved how season 4 was done. It seemed to go faster and was way more competitive with the judges choosing who dueled each other. I liked Twitch getting to choose the redemption round.
I love how positive and uplifting the judges are while still teaching them how to improve their skills.
I have to admit I enjoy Neyo, Derrick, and Jennifer's chemistry a great deal too. I don't think it would work as well if they were bickering at each other.