With this in mind, consider converting your easy pace over to something that meets the above criteria, something that is not easy but easy enough not to overstress the system. Our legs need to incur stress during these runs, but not workout stress. I place runners all over on E runs based on their goals and adjust this pace as they improve. Currently, I have an easy pace of 8:01 per mile. Not too fast, but most definitely not slow (depending on the runner that is, I make all of these judgmental statements about myself). This pace will elevate my performance in a multitude of distances and ultimately allow for a faster easy pace.
Now I have a per run goal, a need for all runners, and a way to avoid junk miles. This pace is to be replicated over the course of runs, whether I feel fresh, fast, and thus able to go, or if I am beat up from a quality workout. This is to apply a proper amount of stress to my system, to force my system to adapt, and in doing so, force my overall level of fitness to increase. Off course, I have to work into it. Some days this effort comes easy, others I struggle, but my goal is to hit this mark more often than not a per run average (regular runs not workouts). As a runner adapts and becomes more serious, such training should be taken into account.