I understand Big League hitters are a different situation but when I work with high school hitters My philosophy was..." The Further you start from the proper lanch point the more likely you are to never get there"
And I absolutely hate too much front foot travel because if you miss time your foot movement by even the slightest amount you have no way to get your foot back on the ground and trigger on an inside pitch.
Pitchers with variable delivery times and good change of pace can make life really miserable for high front leg lifts.