How will the new infused rings work?
Infused Rings and Backpieces will have the inherent +5 AR replaced with a new infusion slot. The new slot has a new type which only accepts the new upgradeable agony resistance infusions (omni infusions such as the simple versatile infusion are not confirmed to go into it, but it’s possible they might). In turn, old infusion slots won’t accept the new infusions, so you can only use them in the agony resist slot of infused rings/backpieces.
Rings/Backpieces infused before the update will get an automatic +5 infusion in that slot. Rings/Backpieces infused after the update will have it empty. The change does not affect the pre-existing infusion slots or the infusions in them – what’s in them won’t change, and what you can put in them won’t change.