I love how you make Kovu and Kiara seems more adult looking I'd say (bulkier Kovu and calmer looking Kiara) , it just tells more that time has passed as they now have child and Kiara is more mature and shows her motherly personality there <3
I really hate these two character's designs in the movie, but wow! You really did a good job at filling them out and making them look mature and more similar to the first movie's style.