Please re read my first post.
Ichiro dosen't hit huge homerun numbers because he chooses not to swing for the stands.
What would Ichiro have to do differently if he wanted to swing for the stands? You might want to talk this one over with your "Teacher" friend.
Jim ... just want to give a somewhat different and complimentary perspective.
You are speaking of the synchronization relative to the use of two legs.
While it is true that most of us have two legs, there can be value found from considering a one-legged/rear-legged view point. From a one-legged/rear-legged frame work, one can capture the value and sync of the 'back side'. That is, one can understand the importance of the spine engine ... or the scrunching action of the rear lat ... or lateral tilt, in terms of the capture of barrel transition. Make no mistake about it, it is the capture of barrel transition where many error and get lost. Capture the transition of the barrel incorrectly, and the swing is off to a rocky start ... and while every swing is in part an athletic adjustment, it is the athleticism employed after the proper capture of barrel transition that leads to highly adjustable swings.
If you perform a one-legged/rear-legged swing that is powered with your arms, then it will feel wrong and it will feel relatively weak.
On the other hand, if one learns to use their body appropriately to "turn the barrel" ... and learn to make use of the spine engine, then the very act of turning the barrel will have the hips leading ... and the critical sync of capturing barrel transition will be learned.
There is definite value in having two legs ... but there is a huge value in terms of learning to "turn the barrel" in a manner that properly captures 'barrel transition'.