I've removed everything from sphag (except for a falcata and a Lou Sneary (in bloom so maybe it'll go in bark after)). I have even moved all phals to fine fir bark as sphag is enemy #1 for me.
I hate repotting plants that have been potten in sphag too as it takes forever to remove all of the stuff, especially with oncidium size roots.
The cattleya was in coconut husk chips that were severely degraded and were just as much of a pain to remove than the phals and oncs in sphag. The new growth on the cattleya is not solid and when I softly squeezed it some brownish water came out, so I hope it'll make it or pop a dormant eye along the rhizome somewhere else. As long as I get something new to grow and stay healthy I can chop it off at a later point in time to save the plant (it'll need some roots first though).
My setup has to be clean as it's in the livingroom of a 1 bed apartment

Just dreaming of the day that I'll have an extra den for my babies.