Expanding range of current neural fiters

In addition to getting the head to move from side to side it would be helpful if it could be tilted upwards and downwards.

Also in addition to getting the eyes to move from side to side it would be helpful if it they too could be tilted upwards and downwards.

Be Happy as a facial expression is too crude.  In the USA flashing your expensive dental work may be a sign of joy, but elsewhere around the world people tend to smile, chuckle, laugh out loud etc etc.
IMHO Be Happy needs sub-filters.

Greater use of templates.  In some versions of PS - not the full one - you can open eyes using another photo as a template.  In the full version of PS you can transfer make up using a template.  Could we expand this to transfer an entire facial expression from a source to a subject.
For example if you have seven people smiling in a wedding photo, and one wondering if they've left the bath running, then trying to match the 8th face to the set is difficult, because other photes of that person will have different lighting.  Surely if AI can recognise facial features in a photo it should be able to apply one set to another ?