there was a clarification already
As I understand it, McLaren's objection is that these points had been looked at and decided in a minuted meeting, using the correct formal process. So in theory the FOM temperature was the official temperature and the refuelling tank fuel temperature was the one that had to be 10 degrees below ambient. Either the stewards didn't know, or like too many stewards before them they looked at the short-term fallout instead of running the sport by the rules. They spent 3 hours deliberating so that does make it look like a "judgement call" - taking the easy way out.
So I think McLaren are right to challenge a poor bit of officiating, to improve things next time, but I don't think they or anyone else want to change the result.