Creating the serializer was exactly what you needed to do, afaik (as Ember won’t create one automatically). You can remove the serialize function though, no longer serves a purpose.
Tried this, didn’t work. Can’t figure out how to debug serializers/adapters either, would be nice to have more control over the process, having hooks like normalize() is nice, but if I cant’t see what is going on when this hooks are called (also to check if they are called), makes things difficult to debug.