I don't mind so much that they woke him up, it's just that the soul transfer was successful. The Crystal Exarch had his plot arc fulfilled.

What I would have liked to have to seen happen is the soul transfer not work. Young G'raha not accepting the "new" soul/memories - or at least not fully enough for Crystal Exarch side to be the dominant. And then being told what he "did" in the alternate future and in the First. That would have given him a new character arc to happen: fulfilling his own shoes. Would be even more notable if the other Scions did ever gain the ability to travel [back] to the first. Original G'raha was an archer so it would have given a unique class to the Trust system and a unique role as well.