The points you brought up about coco are true but definitely over emphasized in the indoor gardening world. The levels of Potassium and Sulfur that are present in high quality coco are not as high as people are lead to believe, or atleast not high enough to warrant a massive shift it nutrient composition. The concept that you need to use a coco specific nutrient is mostly just another clever way for companies to sell more nutrients. In my opinion, the potassium and sulfur levels present in coco are less of a concern than the tendency for it to "hold onto" calcium and magnesium, but even this problem is rare and easily remedied. Long story short, Dyna-Gro is designed to work well in coco so you don't have to worry about a coco specific formula. I myself am mainly a coco grower and I designed our drain to waste feeding chart to work with coco. I do recommend giving the plants a flush once a month and I recommend that you feed at a pH of 5.8 with Grow and 6.0 with Bloom. The higher pH is to account for the elevated phosphorous levels found in Bloom and Mag-Pro.
We don't currently have any beneficial microorganism products but we will have a liquid based bacillus product coming out shortly. Our product will have 5 different strains of bacillus that will improve nutrient uptake and decrease fertilizer requirements. In the meantime, using something like Great White is a good idea. I also recommend using a little bit of a sweetener to give the beneficials another food source. I personally use a sweetener and a sea kelp product in addition to my Dyna-Gro and beneficials. I think you are getting the best of both worlds this way (organic and mineral based)
Foliage-Pro is definitely a great formula. It can be used the whole way through flowering but I personally find that it results in a leafier end product. During vegetative growth, however, Foliage-Pro is an excellent formula and the 3-1-2 ratio is quite exceptional, as you mentioned. The only advantage to using Grow is that it is slightly higher in a couple of micronutrients and you have less potential for nitrogen toxicity. Foliage-Pro is quite high in Nitrogen and some people over-do the nitrogen without realizing it. Sometimes people won't realize they are using too much Nitrogen because the main symptom is excessively green foliage. Most people think that the darker green foliage actually means a healthier plant. Then, when they go to transition to flower, they notice that the transition time is slow and blame it on the nutrients, not realizing that they simply over did the N which delayed their transition. Therefore, I often recommend Grow because it is a little easier to work with but as long as you don't over feed, Foliage-Pro should give you very impressive results and the switch to Bloom will give you a very rapid transition.
Over here it's not quite as easy as a simple return and refund, there is some paperwork involved and they ask questions as to if you followed the recommend schedule and what else was being used during the grow. There seems to be a disconnect between the refund policy that AN's customer service speaks of and what actually occurs in the stores.
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