New Phal Surf Song and a few questions

[Fuzzy]

Got a gorgeous and very healthy-looking new Phal Surf Song from the flower district this morning! Very excited - it has two spikes and many buds yet to open.

It obviously came in the flimsy grower's plastic pot packed with sphag, so I immediately got it out, loosened and removed a bit of the moss, and drop-potted it into a clay pot (the only pot I had on hand that was the right size). I hope that's ok. I was too chicken to go for a full repot because I have another phal that lost most of it's blooms due to repot, most likely. Can phals thrive in moss in clay pots?? What's the best way to water them in this setup?

Also, I got some of this pretty greenish moss (not sphag) just covering the roots very loosely. It looks good, but is it good for the orchid? Are they better off having the roots bare (I'm not planning to water this moss, I will remove it prior to watering)? The humidity here is quite low due to central a/c, and both my other phals had all their aerial roots wither and die...