Yes, ventilation around the roots is very important for Phals. Another thing that's important is to have the crown of the plant slanted a little bit so when you water, the water doesn't sit in the cup of the leaves. See in the pic below how the plants face sideways a bit? Also don't worry when they put roots up into the air, this is healthy. In nature, they cling onto the trunks of trees, so they like lots of air around the roots.
I would water it only about every 3 or 4 days in the winter, and maybe a little more often in summer. But do try to keep the humidity up around the plant, by either spraying the leaves with a spray bottle once in a while, or keeping it in the kitchen or bathroom (if there's enough light). If you keep a tiny bit of weak soluble fertilizer in the spray bottle, the plant will like it even more. Orchids are epiphytes, and feed through their leaves as much, or more than through the roots.
Phals normally bloom in the spring, and mine get "insipred" to send up bloom spikes by a short spell of cool weather. Then as it warms back up, the spikes appear. Yours have been 'forced' to bloom out of season so they actually might bloom again in the spring. But after that only expect to see blooms once a year. They last a long, long time though. I've had blooms go for 3 months on a healthy Phal.
Will you put the plant outside for the summer? Be sure to wait until the night temperatures are staying above about 50deg. Then hang it in a tree with filtered shade and just peeks of sunshine. Trees create an area of higher humidity because of the transpiration of their leaves, so Phals and other orchids just love to hang in a tree. However, they don't like to be moved much, so it may pout a while after you put it outside. See below.
If your plant suddenly develops shriveled up leaves don't panic! People think the plant is dying when it does this, but if you just patiently wait and don't water it except for spraying the leaves for a while it will return just fine. I've had 100% of my Phals that have done this recover. Patience is really a virtue when growing all types of orchids.