From what I can see your plants look OK. Spraying with Physan is good as a precaution against fungal rot, any way I am sure it won't do any harm if applied per instructions. The roots look very healthy and the 'fuzzy moss' doesn't harm the plant but you can use a strong spray from your garden hose to wash it off if you don't like it. My friends and I often use a cocktail of fungicide, insecticide and weak fertiliser for all our plants including vandas, which are actually very tough plants.
BTW I don't quite understand what you mean by 'the top leaf looks bad'. Any way congrats for the new acquisitions. The vasco is beautiful.