more than 50% 希望 is there

You should not be frightened by the RFE. Study really carefully the RFE, if necessary, retain an attorney for assistance. If you get your best done, most likely your case will be approved. I have seen quite few colleagues' cases approved after RFE. However, if you give up yourself, no one else could help you. Please be calm and tough. Hope to hear good news from you soon.