The new leaves are kinda funny-lookin'. The roots are NOT going down into the pot.. their going to the side.. o.o
Have the conditions just changed for this Ping? Leaf shape changes with conditions (especially light) and with time of year. They will get smaller approaching 'winter foliage'.
Can't see any pests from your photo.
Aerial roots are common with Mexican pings. They tend to go all over the place - I haven't yet worked out what they are looking for!
Roots going every which way are perfectly normal. My P. agnata has roots that extend past the leaves.