I think it would be cool if there we UI components that could be in the preview mode that could then set an input to the note. For example, I have a daily template that has the following hidden Dataview inline fields:
%%
Day: Monday
Mood:: 😭,🙁,😐,🙂,😀
Focus:: 🔴,🟡,🟢
%%
From the preview mode it would be great to then have a dropdown, hyperlink, or UI that allows me to select one of the values which is then set in the note.