Side note... I've found the Daniels 2Q is quite difficult, with most key workouts asking you to not just run long mileage but to put extended M/T segments in the middle of those long runs. I've attempted it but even maintaining the M pace segments after previous days of regular distance training is asking quite a bit. There's a lot of reasons most plans simply ask you to run easy on long runs.
Nowadays I just focus on banking high mileage at an easy pace and getting in one quality non-long workout per week. A little too Lydiard for most people's tastes, but it works for me.