Yes, Rick, I grow hundreds of orchids - lots of hundreds. That being said, Phal. is not a family of orchids that I grow much of. I will do my best to answer your questions, but others with more Phal. experience will be able to help you more than I.
The first thing I and other will want to see are pictures of what you have going on with your plant.
Many plants will "sulk" when re-potted, and Phal. can do this. Plants in general do this, and yes, its transplant shock.
By their very nature, Phal. will lose those older, lower leaves. That's just their nature. Those leaves will gradually turn yellow, then brown, and will just fall off the plant on their own. I generally cut my leaves off when they are mostly yellow and sprinkle cinnamon on the cut surface to inhibit fungus invasion.
I think your media is fine. That's pretty much what I use, though I add expanded clay and coconut fiber chunks to the mix. Be sure you have your Phal. tilted so that any water than gets in the crown will have an opportunity to run off. Otherwise, you can/will get crown rot. Phal. likes lots of air exposure to its roots, so air movement is needed for them to do well. I also use mesh pots to maximize air movement in the media. If the Phal. is large and top-heavy, I will go to a clay pot. The unglazed clay allows air to move through its side walls.