My opinion is that, WaniKani has good intentions, but isn’t able carry out well much of the time, just as this thread’s title – It feels like WK somewhat loses its way partway through
imo, it doesn’t really matter even if WaniKani creates new radicals, but changing radicals’ meaning may affect remembering Kanji’s meaning (e.g. weaken Kanji’s meaning). Merging almost similar looking radicals would account for some meaning changes too.
And yeah, sometimes WaniKani fails to dissect or analyze a Kanji in a decent way. Sometimes Kanji may have more than one way to be dissected to help remember, but that’s out of the scope of WaniKani app.