Charcoal doesn't decompose without fire. I would shake a little out to look at what I can see. If the roots aren't dead I would leave it in that pot.
Note well: Its roots are often much smaller in diameter than those of most Cattleya species. The plant isn't too large for that pot, so it could stay there a while longer.
This plant is from the Yucatán Peninsula. It has temperatures and humidity like your summer for most of the year, except nights usually cool off a little. It gets several very wet rainy seasons per year alternating with several, weeks long dry seasons. Winter tends to be dry and warm. The forests are partially deciduous in winter, so it gets a great deal more winter light then than it does in summer. People assume that because it was once called a Brassavola and has glaucous leaves it must need very high summer light, but that isn't true.
In summer it needs very large amounts of water. The owner of Orchids Amore formerly posted here; he said he grows it in sphagnum moss that he gets soaking wet almost every day in summer, and plants not watered so much don't flower much. The comment is here:
Best way to convert an orchid to a mount?
I find plants do best for me when watered daily during the summer, even in semi/hydroponics. I am contemplating moving my three smaller plants into sphagnum moss next spring, because I think even daily automated watering of mounted or S/H plants isn't enough.
Bob Fuchs of RF Orchids in Homestead, Florida (extreme south, nearly tropical) told me it flowers best if given so much winter sun it turns red. He has a huge plant in a wheelbarrow. They move it into the greenhouse for the summer because Florida summer sun is too intense for it. In winter they move it out into a field next to the greenhouse. It gets full winter Florida sun, and is not watered except by the rare winter rain.
I would definitely not repot this particular species unless it were just starting new roots. It might be many months before it makes more roots, and if you damage roots while repotting the plant can be set back for a few years.
Edit - I read the Mayan name when I visited the ruins at Cobá, but couldn't remember it. I found the name
on this site. I had to tell my search engine to use Spanish and search Mexican sites. It was known as "sak ikim lol" which means "flower of white feathers".
The site also shows a diagram of growing orchids in semi-hydroponics.
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