??? It wasn't. Scald was always limited in distribution and only seemed widely available because Smogon allowed use of transfer moves. So if scald comes back and seeing milotic use the move, it's more likely to, at worst have good distribution.
Defensively yes. Offensively lolno.
On a different note, curious what moves that people want mons are already in the game now to get from the dlc. Personally I'd like breloom to grassy glide because...
252+ Atk Choice Band Technician Breloom Grassy Glide vs. 252 HP / 104 Def Zapdos in Grassy Terrain: 160-189 (41.6 - 49.2%) -- guaranteed 3HKO
Yes you'd need Rilla support to pull of, but you get a grassy glide that is several leagues stronger than Rilla's own, and clean up offense. Reliable? Probably not. But a funny thought.