The whole codename conversation was, in my opinion, just Henry saying he wanted to call Emma mom, but he didn’t think she was ready yet. I do think Emma has power though and that it is important.
Good point. I did notice the difference in reactions when Regina gave him the video game compared to Emma returning the book. He looked at her as if his Mom just gave him back his favorit toy. Emma’s return look was the first time she ever had a mom-like look to her. she does say mom things and it is mainly to MM. Emma took a few episodes to stop calling him kid on a regular basis and now calls him Henry mainly.