You look to be getting pretty close. Plant is finishing up! I would do nothing other than pull most fan leaves and possibly a brewed tea for late flowering. It looks deficient but at this point it is too late to correct. Looks like more airflow would help/thinning lower leaves.
I just experienced this with two plants last grow while the other cames out fantastic. Personally I think it was because my ec was a little too high for that strain. Plus them were the two buckets I couldnt really check on because of how it was setup (resolved) so oh swing could of also been the culprit!