Rozie

This not not true in every case. My friend sent a cr1 for her husband with only the required documents and no supporting evidence. I told her for sure she would at least get an RFE. Not only were they not denied, they didn't get an RFE. She did send evidence to his interview at the consulate and he was approved.

To be fair, I sent my petition with very close to little relationship evidence. That shouldn't be an issue for the I-129F stage, although frontloading with the OP's embassy/consulate may be wise.
 
Lacking other types of evidence that is actually required (i.e. evidence of meeting in person, evidence that they did not meet via an IMB, etc.), is another issue altogether.

When I noticed an error I made on the I-130, I called USCIS to ask what I can do to correct it. They advised me to wait until I received the NOA1 then write a letter explaining what the error(s) were and send them to the PO box listed on the NOA1 (TSC). So maybe wait until you receive your NOA1(if you haven't already) and then send whatever evidence you forgot to send before, along with your receipt number of course.

Just to clarify here, RFEs are not going away. This is an overreaction to recent changes. However, petitions with major components missing could be rejected outright and require a refile (which is not unreasonable). How yours will fall, only USCIS can decide that. Wait until you hear back from them to know what your next steps are.

Do not send anything that is not requested. They receive millions of documents and it will be at risk of getting lost. Best to wait to hear back from them.

the evidence would likely never find your original file, or at least not until its too late. 
 
wait for an RFE (best case scenario) or for a flat out denial (depending on what was missing). this was a MASSIVE error on your part. 

But if the individual did not include any type of evidence with their petition then it will be denied. This is the exact kind of thing that the new directive is trying to curtail. 

I agree.  I would be greatly surprised if this one results in an RFE......i really don't understand how petitions get sent with zero evidence.
 
OP- I wouldn't send anything until I received the Communication from USCIS.