[AtlUmpSteve]

My opinion is that, while it is a real step-saver, it effectively writes off any realistic possibility of monitoring illegal pitches related to contact with the pitcher's plate; either the stride foot not in contact with the back, or the pivot foot sliding off the front. So, effective only if 1) all pitchers are completely legal relative to those issues, or 2) the showcase you are working doesn't want those called even if they exist.