If they make crow evil again, then they’d of wasted time and resources on trying to make him be good. It’s too late for that “evil nature” to come back. Especially now with lightfall. The odds of Anna being evil are greater than crows. And he was only ever “evil” because he was corrupted by the darkness. He didn’t actually willingly choose to be that way. Even though he was still a-blam!- to begin with. He was not inherently evil at all.