Why not show ELO ratings for the daily puzzle?


At the least, the ELO rating of the puzzle could be discussed in the video that accompanies the daily puzzle after it is solved.

This is a fine suggestion. The site has a puzzle statistics page which include information about the rating of the puzzle, its solve rate, how many times it has been played etc. Undoubtedly the daily puzzle is taken from the pool of existing puzzles already on the site, therefore it has one of these pages, but com has elected not to give any option to access it from the daily puzzle page.