Yes, part of the AJATT/MIA philosophy is that as you hear & learn more and more Japanese words & sentences, two things happen:
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You will naturally be able to hear “words” instead of a constant stream of gibberish, even if you don’t know yet what those words mean
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When you start to know some “words” and be exposed to a ton of natural “sentences”, then you will intuitively start understanding grammar
And it is this “intuitive” understanding of grammar through exposure (vs. learning grammar solely via textbooks) is what will eventually lead you to proficiency.
So for me, the biggest takeaway is: learn things in context. Don’t just learn kanji by itself, or even isolated vocabulary (the WK way). Learn vocabulary as part of learning entire sentences. And the more sentences we’re exposed to, the better.
Incidentally, Japanese textbooks like those used in university courses are great resources to learn sentences. 
Like you, I’m going to continue with WK, but will try to incorporate in-context / sentence-level learning as well.

. At 55K a year (or over 70K if you live there), this is crazy expensive even with financial assistance.
