Would Talisman of Ascension building out of Forbidden Idol (again) be too much?

First off, let me say I've barely played this game much in the past 4 months. I don't know how valuable it is to have Raptor's Cloak on Talisman, nor how much people value it. But back when they changed Forbidden Idol to enhance heals and shields, I got pretty excited then I read they removed it as an ingredient to Talisman. Then I became bummed out, because I loved rushing Talisman but I no longer do so because of the changes.

Would it be too much or too powerful if Talisman of Ascension had +10% or 15% healing/shields? I loved getting this item on passive supports such as Janna, Soraka and occasionally Nami or Sona if the enemy lane had a scary counterpick. I get Soraka is strong right now (main her for 6 1/2 years now), and I get she's getting nerfed again because people simply struggle to counter her with Grievous Wounds (which is easily accessible now), but I just really loved Talisman and the new Forbidden Idol is a favorite item of mine now (on top of what it builds into).