"Neither of those are outright REJECTIONS of either step, in the way that Bibi is pleading for an outright REJECTION." You are being very naive or is it wishful thinking? Everyone knows that politicians do not make clear cut statements when they have audiences with varied opinions (specially in Obama's case where the whole Arab world is listening). These statements from the Obama administration are as hard as can be expected regarding the opposition of the administration to the report. It is clear that the adminstration will oppose any concrete action against Israel.
Firebomb thrown during demonstration in northern Israeli town of Umm al Fahm (Haaretz)
from the article: U.S. calls UN report on Gaza war unfair to Israel