I leave this here because I do think that a very part of the forum crowd is over-thinking fertilization.
Dennis I agree with you.
There are many posts that start with "What is my deficiency?". In most cases, nutrient dosing is the least of their worries. And diagnosing deficiencies without knowing every other thing about the tank is unlikely to get to the root cause. In most cases, a more holistic approach will provide better results.
You have to have light, CO2, and equally if not more importantly maintenance in correct balance before adjusting ferts will make much if any difference. Until you get the rest right, adjusting ferts is like playing an endless game of whack-a-mole. You most likely will never solve your problem.
I look at it this way. Take a tank like Burr's. I have seen him run his fert dosing in many different directions over the years. Almost no micros, lathering on micros. Almost no macros, lathering on macros. Yet somehow his tank always looks beautiful and plants are healthy. Why? Because he spends a great deal of time getting every other single thing right, with a great attention to detail.
And that's what most don't want to do. They don't want to hear lower/raise your light. They don't want to hear clean your filters more, get your pH drop from CO2 more precise, get on a regular water change schedule, control mass and trim your plants more. Getting their tank uber clean would be the single best thing to help most, but it's easier to dose more/less of something/everything.
Now all that being said, I do believe once you get things running well, experimenting with fert dosing can fine tune things. I've made a major change to my own dosing recently, with very good results. But that wasn't to fix a problem. That was to see if I could improve and grow in the hobby.