I really wonder if the reduction in the number of practices over time has led to a paradigm shift. Rather than focusing on execution and chewing up clock, it's better take more shots (and risk more three and outs) because no one is getting the practice time to get 11 guys on the same page for 10-15 plays a drive multiple times in a game. It's better to run simple, fast offenses to get down the field in fewer plays (i.e. fewer opportunities to make execution mistakes).
On the flip, defenses are adjusting by going more "bend, don't break" to force offenses to execute 10-15 plays in a row. This is how everyone played Mississippi State after Arkansas dropped 8 every play. In other words, DCs are like "we'll let you have yards, because we know you're eventually going to f@#$ up and get behind schedule."
1. The team that makes the fewest mistakes will win. - Neyland