Raksha should've had Baloo's arc in the film.
Remember how Baloo had a mini-arc about learning to let go of Mowgli and was willing to lay down his life near the end to protect the boy?
Personally, I feel like Raksha should've had that arc in the movie. She was the one who raised Mowgli, loved him like a son, and shaped his identity. Baloo only knew Mowgli for less than 2 days, and yet, we're supposed to believe that his connection to Mowgli's journey of self-discovery is more important and impactful. Here's how Raksha could've filled Baloo's role in the film:
1.) In the beginning, she could be the one to find and rescue Mowgli from the river instead of Bagheera.
2.) They could show her nurturing Mowgli and teaching him how to hunt and live in the jungle.
3.) When Shere Khan returns, have her get into a heated argument with the other wolves at Council Rock, but after some convincing, she reluctantly agrees to let Mowgli go (similar to Baloo and Bagheera's argument in the film).
4.) She could inform Mowgli that he must leave and have a tearful goodbye with him.
5.) Later on, the pack hears about how Shere Khan is actively on the hunt for Mowgli, while most of them are reluctant to face off against the tiger, Raksha puts her foot down and makes it clear that with or without their help, she's going to rescue the boy, and runs off to rescue her adoptive son.
6.) Near the end of the film, she and the pack appear and join the final battle against Shere Khan. During the fight, she gets fatally wounded, and after Mowgli drives the tiger off with a fiery branch, he notices that she's dying. She tells Mowgli that she always loved him like he was her own son, before slowly dying in his arms (kinda like this https://youtu.be/WbW8GgAWKi8?si=rUYIid0ZvxALqyKf ). After which, Bagheera gives a memoir for the she-wolf before they leave.