So evidently that wasn't the actual reason you thought it was an issue. Players are already incredibly competitive with alts and bots in this system. A player who is sitting around, twiddling their thumbs and waiting for 200% FEP gains is losing out on stats compared to the player who is eating constantly and straddling the 50% FEP gains. You'd have to avoid playing for over a week to meaningfully utilize the upper rungs and for what, so that your food is 2x as effective? Compare that to the player who feasts constantly and eats 20x as much food and bounces between 90% and 50% gains every couple of hours. They're going to get more stat points than you by sheer volume.
Yes, someone running dig bots/alts constantly is going to have a little more control over their food schedule than someone who does it themselves but ultimately the gains from that are small. Players who set out on large scale leveling projects without securing tools or food beforehand are digging their own grave. Maybe scale back to reasonable amounts of terrain modification until you've developed the necessary infrastructure to allow you to dig and eat efficiently at the same time.