If I had a coach that I trusted I would certainly follow the advice.
Have you ever thought about getting one?
If nothing else, I am ULTRA consistant. I always follow my planned schedule without fail.
That can be a fault too.
While not very fasy I tolerate mileage well. I never have trouble recovering from runs.
Maybe you’re not running hard enough.
After every marathon you say the same things, I’m going to increase X miles per week, drop my pace by Y seconds per mile, add Z workouts, etc. While your dedication is admirable, sometimes you have to take a step back and look at the big picture.
A quote I like “if you want the things you’ve never had before, you have to do the things you’ve never done before.” Maybe all the elements are there, but you just need them tweaked or shuffled around. Maybe you need more rest, fewer long runs, more speed, etc. There are lots of variables. More, more, more, faster, faster, faster, is not always the answer.
I like Dan’s idea of focusing on short races for a season. If I remember correctly, everything you do focuses on 2 marathons a year. That’s fine, but you can still race short races and work on speed. It doesn’t have to be one (marathons) or the other (short races).