Repot, hope for the best. They are pretty easy to grow and your plant looked great in the first photo, as mentioned, they are not a fast growing plant , not even sure why you would think a perfectly healthy looking plant had root rot.
In the future, don't worry if you don't see any noticeable growth of a pothos. A new plant settles in, adjusts to the new lighting, the roots get established if repotted. All things that won't be apparent as active growth patterns. If this one survives now, the two recent disturbances of unpotting may very well show up in the leaves, what's done is done.