While it's tempting to dive in to debate your points, we don't even know if DOJ will appeal the ruling yet. It has not even been a full business day since the ruling was issued. I have found the DOJ filings to be very informative so I'm waiting to see if another will be filed soon.On the other hand, this was a stinging defeat for the DOJ in a case that liberal lawyers and pundits were ridiculing, saying it had no chance of success. The amateurish way the FBI conducted this whole thing, especially the ridiculous picture of papers strewn all over the floor has emphasized the need for a special master, so the judge's ruling is solid. It should not be interpreted as a delay of an inevitable conviction of Trump.
One thing is certain - it will be interesting to see what the special master uncovers as he/she sorts through this mess.
The photo you mention can be debated. I believe it is an evidence photo like those commonly taken at many searches where evidence is seized. We know it was an evidence photo from the tent-tag label and ruler placed in it.