Originally Posted by bamazav
Not sure I fully agree with your position or premise. With beginners especially, a healed shoe or a board will cause them to lean forward or push through the toes. This is leads to poor form and can cause injury. If your form is poor flat footed, you will only exaserbate it by lifting your heals. More advanced lifters do make use of heal lifts, as they do hit your quads in a different manner, but I would not recommend them for beginning lifters.
If this was directed at me. I partially agree with you. However, since the heel puts your knee at a more forward angle, which allows you to go deeper without losing back tightness. As long as you are consistently pushing through the heels using a high bar squat, it shouldn't be a huge issue.