Let's talk this through

Elanna nodded. Well, needing treatment the rest of his life was perhaps inconvenient, but it was better than a guaranteed death. I agree.

Honestly, I'm trying to see the downsides to this. The only thing I can think of is that while everything looks promising we simply don't know for sure that it will work as intended or what the side effects would be. I suppose the only question is if there's any chance of this making things inadvertently worse. Not that she didn't trust Rosalie, or that it wouldn't be worth it to try, but as promising as everything sounded Nate would ultimately be the first, or one of the first, to try this. There was always some risk in that.