For SCH, making Whispering Dawn an ability makes the cancel change kind of redundant. The only remaining spell fairies have is Embrace.
While on the subject, making WD an ability (instead of an instant-cast spell like Bio) is a significant nerf; it no longer benefits from Rouse (+40%) or Fey Illumination (+10%), and the +20% base potency is a sad substitute. There was really no reason to ever not use Rouse with WD as they are on the same recast, so in practice WD's potency went from 140/tick (with the option of 150) to a fixed 120.
Really annoying. But at least SCHs can get rid of their Illum+WD macros, as they are totally useless now!