I missed it, it said that they're all done. but in terms of expressing emotionality in animation it depends on how you direct the action?
do you lead the audience to be first aware of the emotion, by letting them anticipate the reaction of the character's emotion?
do you let the audience experience the emotion through reaction of the character?
both will work depends on the setting: drama, comedy, horror, how well an actors emotion comes over depends on the suspense/anticipation created by the director
this is my naive understanding of it, but its how I understand it