Hello from Apopka. Being Floridian myself I notice the drying out alot with my mounted dendrobium. Oncidiums are a bit particular to not liking to dry out too much but short dry spells don't harm the plant either. As you know our seasons have been way off lately. I mean it should not be 80 degrees in December not even here. Add this years heat wave to last years cold vortex and I have noticed some of my orchids getting very confused. As long as there are signs of growing the plant should be fine and just needs time to re-adjust/stablize. Just try and keep it warm since it will be very sensitive to cold weather until it strengthens. As for the humidity, it is great for aerial roots to recieve moisture but yes moss will dry out due to evaporation, especially when its warm. You haven't mentioned feeding schedule for plant. With few roots to take in nutrients you may have to provide some extra nutrition to the plant.