If you do like decks with WaniKani vocab filtered out, you should definitely check out FloFlo if you haven’t already. Bulk adding vocab to lessons there and exporting it to Anki is pretty much how i generate all my decks now 
Personally I enjoy learning the vocab of a book way more than I do studying the core decks, because you have a short term goal. Learn ~1000 words and you can readトキメキ 図書館. The first and following volumes largely overlap in vocab, so another 200 vocab and you can read the second volume (and so on).
And since it’s a childrens book, the words are pretty common too. Most of them are in the core decks, but you get to use them faster. Not trying to say the core decks are bad, just that studying with reading as a goal in mind is way more fun to me °~°