I am concerned because I see some people trying to minimize the Kavod and Gadlus of Rav Moshe Feinstein ztsal because they have an agenda to disallow shavers.
I agree. The author of הדרת פנים זקן had the audacity to write that his psak is not one which can legitimately be followed. He should go to R’ Moshe zt”l’s kever and beg mechilah.