Phal Done Blooming Can I Repot

[Cattleya17]

Hello i have bought a phal from normans orchids and the plandt is in Sphag and i noticed a root or two starting to turn brown and kinda soft. i really dont trust Sphag all phals ive ever grown have died and the only coincedence is the sphag they grew in. i recently early this year potted a mini phal in bark and it immediatly started thriving and made several new roots 2 new leaves and the new bloom spike it created is just now breaking buds! so this phal from normans just finished blooming and i had noticed that happening to the roots so i was wondering if i could repot it now eventhough it hasnt shown signs of new growth yet???

I know from experience that normans sphag is tightly packed and i really dont have a good track record with Sphag so i would like to get it out of it asap!
What Do you think??