Wow, you got a DD for this? A late kudos on the accomplishment, DS. Welcome to the club.
I really like this guide. It's simple enough for casual artists to grasp, yet deeply significant on providing tips to give their work a sense of focus and harmony just by changing a few lines. It's amazing how the direction of someone's gaze can affect the overall impact of the piece. Submissions that showcase your eduction are among your best work, IMO.
Great tutorial, and some well laid-out tips on how to fix things that could trip a learning artist up.
I would like to add though, that by colouring Jack Rabbit yellow, you did put more focus on him via use of colour rather than use of placement and shape, which may or may not have worked against the point you were trying to make. That is the tricky thing about composition - things like light placement (and shadows by extension) factor in as well.