Have a more varied spell rotation
The Imp WS change keeps you from using up a charge on a relatively low mana cost Acheter des Gold, which I can see even if I will not be happy if I have no mana left and am using LHW because itis the only healing spell I have the mana for. The change to Healing Way is probably due to the fact that a lot of resto shamans do not bother to take it anymore since they have a more varied spell rotation with Riptide and Chain Heal still the standouts.