it may be okay
as far as you got the RFE notice in hand.
If you can provide all the required documents asked for, may be you can send them to INS directly. Only thing is that the format of employment verification letter can be made in a better way with the help of an attorney. If you are going to send G-28 form again to represent you in case of interviews, may be it can delay the process. Did you change jobs during the process?
This is just my view. Please discuss/email with friendly attorneys like Rajiv Khanna, Sheela Murthy, Alan Heckler etc. for confirmation.