I'd say it's slowly getting worse, yes.
Nute recipe: http://www.gobiodiversity.com/documents/feedchart.pdf
I water then skip a day then feed then skip a day then water, etc.
The whole lot of Biodiversity products. 1.5 times a week. 85 degrees. Spraying for bugs but generally only every 10 days and always after 6pm. Definitely not spray burn. It'd be spottier. This is def a nutri burn or deficiency.