Neofinetia falcata with Rotted/Dead Roots

[meghanize]

I purchased my Neofinetia falcata about three years ago and enjoyed slow, but noticeable growth until this year, during which it just seemed to be in stasis. I finally got around to unpotting it, and as I feared, I see some root loss.

My home climate is between 70-80 degrees, likely far too warm for the Neofinetia's liking. Humidity is fairly high as I keep the plant in the master bathroom so that it can enjoy steam from showers and baths. I doubt I've overwatered the plant; if anything, I've sorely neglected it. It was originally potted in peat in a clay pot.

I'd love to save this plant, but I'm unsure as to the next steps. I'd appreciate any insights that you could provide!

Below is a photo of the damage. Thanks!