It would be nice if Choice components returned not just the content of the source column but also other relevant columns as well (just as the COLUMNS do with forms).
That would save Lookups in the underlying sheet. For example, when displaying a list of colours to choose from, or a list of pretty much anything with a code associated with it, it would be handy to carry the code column along with the choice column:
1 yellow
2 red
3 blue
I choose “2 red”, so i would get “red” and “2”.