the roots look very nice.
i would just take it a bit easy on the watering.
it is in a seethrough pot so if things start to look like the roots are deteriorating than i would not wait to repot.
my advise is; if the phal looks like it needs water; wait another 3 days.
This will go against all pot-size convention, but when I move phals into S/H culture, I try to move them into pots that are almost the diameter of the plant's leaf span.
I find that when I do that, the aerial roots redirect themselves down into the medium and anchor the plant really sturdily.