Just wrote a post and lost it. GRRRRRRRRRRRRR
The goyo are relatively easy to learn. They are only the alphabet of kodokan judo. Lets take a look at the works of Shakespeare, Tolstoy, solzhenitsyn
Wilde, Shaw et al. They made an alphabet sing with colours and shades.
The gokyo do not teach hazumi, debana, maiai and kuzushi. The gokyo don't directly teach compassion and care, self respect, respect for others, self discipline and integrity of action.
Judo does have a learning curve and that curve is a continuum, we pass though phases of understanding then what we thought we understood we discover we didn't!
Judo is different for every single pupil. We are all different and this difference is to be celebrated and accepted, it is what bridges divides and builds bridges. In terms of training in judo I do understand your question and I am truly sorry to answer you with esoteric answers. What you ask though is not really practical to answer. The best I can do is answer why I cant answer!
My lost post was better than this one!
BTW do rant and have your say. if you don't you will never push the envelope. Please don't accept what is written here and swallow it whole. Push for answers and by doing that you make every poster think especially this one.