Like the cells have to grow in, and from there it would be a more scaffolding method. Instead of the fleshgoop, then covert into Vigor to heal. Or no need for a adaption time.
This makes more sense and would allow for more cooler interactions. Were a Physique healer would use fleshgoop, and use it to seal a wound for a frontlierer. Or a healer saving a limb by cutting off the rotting one, and seal the wound with fleshgoop. And slowly sue healing for the fleshgoop to be adapted to them, then heal it.
This restriction would go down as one got more skill with interacting with bodies outside of there own, and inducing the healing process and reducing the 'adaption' phase by alot. So big daddy Physique can reconstitute a body from a chunk of flesh. With minor tweaks because he is using himself as the dna source. And using nutrient rich salve or liquid to fuel the growth of cells.