Ya I agree. Hazards will be dominant to the point where I feel Boots will be the best item. Keeping Toxic is great, but based on what you said its going to require more support to make work. It's not the same self-sufficient wall it was the past 2 gens. But I could definitely see it rising to A+ eventually because it can form nasty cores with some strong Knock Off users. Eject Button will definitely be the set to run.
Psychic / Fairy is not "excellent" defensively. Tapu Lele has some defensive utility but that's more-so due to how amazing Psychic Terrain is, not the typing itself. But outside of that you are spitting facts. Spirit Break / Close Combat / Swords Dance / Knock Off covers pretty much everything. You can even run STAB Zen Headbutt if you're worried about the aforementioned Toxapex walling you. Can anyone confirm if Energy Booster works like Beast Boost does? I was thinking you could EV Iron Valiant to boost Speed then follow it up with a Swords Dance.
Also I'd like to see some more discussion around these two Pokemon:
Houndstone || Ghost-type
Sand Rush x Fluffy
72 HP / 101 Atk / 100 Def / 50 SpA / 97 SpD / 68 Spe
Basculegion || Water / Ghost-type
Adaptability x Swift Swim x Mold Breaker
120 HP / 112 Atk / 65 Def / 80 SpA / 75 SpD / 78 Spe
Both of these weather abusers get the move Last Respects. This Ghost-type move is 50BP, but it gains an extra 50BP for every fainted member in your party. This means the move can reach a power level of
300BP before STAB.
Absolutely.
Fucking.
Insane.