Yes, my attorney categorically adviced me not to interfile. Let me quote her -
We can ask for your current AOS to be transferred to your EB1 approval, but please note that there is no guarantee this will happen. There is no form to request a transfer--we simply send a letter of request. Because there is no form, this means the USCIS also does not issue a receipt notice of the request. For this reason, we generally have no way of knowing if the transfer request has been granted or not. Instead, because the EB2 category is retrogressed for those from India, and because the transfer request is not reliable, we recommend you file another AOS based on the EB1 approval.