News flash riot, I build SV because it's generic
I'm not building that fucking sceptre because I have almost no incentive to buy the fucking thing as a
(q max only) main.
I'm not building adaptive helm either if they dont have a cassiopeia (hell ryze is just irrelevant now so its not worth mentioning him).
And hell, even if some of these niches were to be satiated in certain circumstances, I would still buy SV over the other two items because it synergizes with the kits of my champion the best.
The SV nerf isnt going to make the other two items suddenly more attractive, it's just going to make SV shittier but still shinier than the other two shits.
Also, this change is going to disproportionately affect juggernauts who tend to rely heavily on spirit visage and cant really afford to buy the other two items in most circumstances even where their purchase would be justified for most other tanky champions.
If you want the other two items to be better, try making them a little more general. When an item is too niche (cough ohmwrecker cough) it usually just becomes a never purchase in the face of general items. And if general items get nerfed, then eventually all the items in that category suck ass.
TL;DR
Dont make SV uglier, make the other two hp mr options more attractive on their own merits. If that means taking a little bit of their niche and transfering it to general stats then so be it. Abyssal is slightly too niche, and adaptive is way too damn niche.
is useful against more the cass and ryze.
burst is fairly weakened by it, since all of her spells except Charm use different instances of damage.
ult will be reduced by it.
dots reduced by it.