What the Department of State told me is that No Objection requests are determined by them first, they issue a recommendation and forward it to USCIS. USCIS will follow the decision in 99% of the cases. If the Department of State would have made an unfavorable recommendation, then they wouldn't even have forwarded it to USCIS. The final determination is generally made by USCIS. But this is a no objection case, it's not like a hardship or persecution base which will be filed by USCIS (directly via I-612).
In the adjudicator's book it says:
So I guess they just review that everything is correct?