I can definitely see the struggle for HC especially, but choices is what matters.
And i do not think that you can’t work those new affixes into a hc viable build.
Yes of course you lose some potential defenses, depending on your build. But it will be only helm and body armour and you still have 2 prefixes.
I don’t think it will hit build diversity that much. Some builds might struggle really hard working them into they build (like HP Regen/Armour Build or Armour/Dodge builds).
But dodge for example is easily soft cappable without all affixes where it’s available.
Also don’t forget, you might get +X to a defensive skill, which could be interesting for HC especially.
We only saw the + to X skil laffies now, maybe EHG coems up with even more skill specific affixes? Like +X seconds to Ring Of Shields and stuff similar to this.