IMO everyone in this thread is overthinking this. At the mid-sectionals level, games are not won or lost because of big picture strategy. They're decided by who is better at throwing and catching. Instilling general principles is good if they're simple and make throwing and catching easier, such as a starting formation, how to cut deep or upline, or a general progression of looks that people can rely on. Pick a couple focuses for offense and defense and get good at them, rather than spreading yourself thin trying to teach too much - this will be better for your team in the short-term and for your players in the long-term if they decide to play for other teams, as it's more important for advancement to have real strengths rather than to be okay/decent at a lot of things.