this has probably been said a million times but the overall removal of Scald/Defog is so overly frustrating, because so many Pokémon who had them removed needed those moves (or, by logic, should be able to use it in Defog's case - can birds no longer flap their wings??)
Slowbro, Slowking, Vaporeon, Quagsire, Pelipper, Gastrodon.. hell even Toxapex and Alolomola losing Scald doesn't make a lot of sense. If they wanted to limit its usage, they could've pulled a semi-Toxic situation and just allowed Water types to use it.
I'm hoping that the real big losses, such as Knock Off, Triple Axel, Defog, Grassy Glide, Expanding Force, Rising Voltage, and the other non-TM, rarely learned moves come back as move tutors in the DLC. (Scald is probably gone because it was removed from everything sans Volcanion)