Why did Riot nerf AD Sion

I think you are missing the point...tank is dominant because his base numbers were so high. They really nerfed tank sion by lowering the damage early, since he cant just build pure tank and still do that same damage.

Either way i think the nerf is insanely stupid, there are WAY more op champs than sion, why do they pick and choose who is allowed to be op? There is obviously no end goal for balance, more of a * oooo lets make this champ op this month, put out some skins, make some $$$ then nerf them to be unplayable until we can make more $$$ off them * fuck this stupid game