After watching the first season, I was stunned by the amazing and fluent animation and I was really looking forward for the later seasons. When they arrived however, I noticed that a lot of the episodes looked so mundane and rushed compared to the previous ones. Another thing I noticed is the pitch of Marinette's voice. She literally sounds 8-year old.
I still enjoy the show and it's amazing storyline, but I really hope they bring back the breathtaking quality of animation that the 2nd and 3rd seasons lacked, and hopefully they fix the pitch of Marinette's voice.