You're all making this a lot harder than it needs to be.
Literally the entire cannabis industry is made harder than it needs to be. Their fucking plants. You stick them in the ground and they grow. You add fertilizer and they grow bigger. So many people spend too much time on the technical side of things they forget about the whole "working hard" side of growing plants. Both you and I and everyone else are guilty of this.
Just build University of Florida's hydroponic tomato formula as an A+B and be done with it...
The UF hydroponic tomato blend is actually a shit load of different blends, all with very similar targets.
https://edis.ifas.ufl.edu/cv216
Go have a look. And tell me the average joe is going to get confused as all shit really quickly. There are 5 different growth periods, and they show you 4 different premixes that you use with things like Calcium Nitrate and Magnesium Sulfate. Over all, that page has like 40 or more different fertilizer blends. And then, about 3/5 down the page, you find the blend that you're talking about.
"Table 5. Several examples of tomato nutrient solution formulations using the “formula method” with individual ingredients." And there's still even 4 different formulas for that, each with 5 growth stages. How the hell is someone going to know what to chose? An average person looks at a bunch of numbers like that and freaks the fuck out. While the idea to use their proposed targets may be valuable, it is also not an end all be all for all stages of growth. It is best suited for the vegetative growth stages of the cannabis plant. Not so much for the flowering stages were lower nitrogen is necessary.
The reason the liquid blends sell so well is because they don't require any mental capacity to use. The consumer likes convenience.
The whole point of doing this reverse engineering in the first place was to introduce people to blending their own fertilizers. Something that most of the industry is still clueless about, even on the commercial level. It was simply a step in the right direction. So, instead of diving full on head first, you get something that is little easier to swallow.
It's like reverse engineering betty crocker cookies when you could find the recipe online in 5 seconds.
Except there are hundreds of cookie recipes on the Internet and there are comparatively few fertilizer recipes that are often hard to find when you have to sort through all the liquid blends that dominate the search results. So it doesn't take 5 seconds to find it. While I understand the sentiment, there's a ton of people who haven't learned of the cheaper ways to do it, and they have huge fucking egos, just like everyone else here who thinks their weed is the best thing since sliced bread.
The point of this is to make it available. Something that hasn't been so easily available in the past.
In this case, that means starting with blends of what people are already using. And soon enough, it will mean cannabis specific blends.