My two guesses are they didn't think the guys would 100% buy in/adapt to the approach and lose their Donging ways but more blend it with their Dongs and have a super approach and also in that article Chili mentioned pitchers "pitching away from launch angles" or something. Maybe they thought pitchers would correct faster against the launch angle revolution and get ahead of it with an approach Chili ball would have the offense ahead of the curve vs the league? Either way it was a horsefeathers up and they failed and am glad they admitted it and moved on. I think it's basically this. JD Martinez, who is probably the smartest hitter in the league and basically the Che Guevara of the fly ball revolution, has embraced Chili ball a little bit. Last year, JD went to the opposite field 28.9% of the time. This year it's 31.4%. Last year, JD hit 38.3% of balls on the ground, this year 43.5%. And with it, his K% dropped, his BABIP skyrocketed, and he had a career year. The high fastball has never been more popular, so somewhat lower launch angles are probably called for. I think the key is balance. You could argue Chili ball helped Schwarber, who was an extreme fly ball hitter in 2017, but became more balanced this year and saw his K's go down and his BABIP go up while losing practically nothing off his HR/FB rate. Almora and Contreras, two guys who were already too GB heavy, clearly suffered (though I tend to think Contreras probably just got worn down). Russell became a total horsefeathering mess, probably because he never really had second deck power to begin with. tl;dr Chili, like his namesake, has its place but is best enjoyed in moderation.