Certified GKH Gardening Expert
You should only replant if you can pull the whole root mass out and the roots are encircling the container. If it is not root bound, there will be no need to change the container, as doing so while the plant is stressed will worsen the problem, unless absolutely necessary.
Unfortunately, your photo did not come through. I cannot see what needs to be done.
I can say that these plants are very susceptible to root rot. Any overwatering will lead to brown and yellow spotting, curling leaves, and other symptoms.
Here are some articles that will help: