What I am about to say is going to create scoffing as this is the opposite of what is taught.
It will create more hip turn, which a lot of people still think is bad.
If you have trouble shifting your weight and all else has failed, allow the left (front) heel to come off the ground and it will assist you in many ways.
Your weight can’t help but go to the back foot in the back swing…and in the downswing, you can’t possibly start it without putting your front heel back on the ground and that initiates the weight shift back to the front foot.
In addition, it helps your transition and in turn, your rhythm.
This is for a higher handicapper that just can’t get his weight shift going.