I wouldn't repot them right now. They look OK. And you can grow Phals in spaghnum as long as you dont overwater. You want the moss to become almost dry before watering again. However, if you are in a location where the temp is cool, especially at night, you may want to repot in bark so it will dry faster. It is likely to get a fungal or bacterial infection if the plant stays too damp and too cool. Those are my thoughts. Good luck with it. The plant looks great and Phals are some of the easiest to grow.