We know they were trying to do things with his front leg/foot load all year. Whether you want to believe that was the only reason or one of the reasons is pretty hard to nail down. Maybe it's just that, maybe it's a combination of that, the wrist injury, timing being off, hand placement, etc. We don't know for sure, but I think the internet sleuths that looked into his swing with the toe tapping mentioned that his bat looked a bit wild/out of control as it went through zone (I THINK this was the conclusion) which was forcing a lot of weak contact. Apparently the toe tapping completely disappeared after his 4 day break in Colorado. There was an initial struggle, but the last 2-3 weeks of the season he started driving balls a lot more consistently so the hope is that he's re-adjusted to his old swing and is ready to kill it in the playoffs. I'm no expert, but it seems like as plausible an explanation as any for Heyward randomly dropping off a cliff offensively at age 26 with an OPS that was 70 points below his 2nd worst season and 160 points worse than last season. Oh I agree, if we are going with messing with his swing was the sole reason for throwing him off it likely started with the toe tap/leg load they were working on and then it had a fallout effect on the rest of his swing and timing.