To be fair, regarding the transitive and intransitive verbs, Japanese does treat them like different words completely and you can confuse people if you try using the wrong verb. I’ve hard breakdowns in communication because I assumed that my “close enough” idea of a transitive verb actually ended up with me getting in trouble for not having that thing officially done because I answered in an affirmative intransitive verb. As frustrating as the words can be, I am in favor of them keeping the meanings separate as the nuance is really important, However…
This is the part where I think that learning the transitive and intransitive pairs require more effort on the WK end to explain them. Their inconsistency in adding “something” to each transitive verb should be standardized. Or at least something of like a memo marker? Like IN for Intransitive or TR for Transitive verb. something that will grab the learner’s attention as I often skip meanings if I have heard of a word before. I just look at the word bank, try to get a feel from the ones with multiple answers, and then go from there.
Also related to this here,
Every content updates post has several words that get changed or refined. Some of the refining parts include things like blocking synonyms (in this linked one there is a new blocked synonym for 繋ぐ)
The reasons for blocking words usually come from this thread I believe (at least this one is the most common one where the mods are asked to block certain words)
This is a recent post highlighting how sometimes the WaniKani forgiveness for spelling errors can accidentally add words that mean completely different things and then starts conversations about the nuances between similar words.
I think someone asked how to see all the blocked synonyms for words but I think it was a script or it was an offhanded comment made around the forums at one point but I’m sure there’s something out there somewhere.