I felt that way at first, but it’s actually satisfying once one starts to burn those kanji to realize that sentences that were once just pure gibberish are finally a bit more intelligible somehow. That is, if one bothers to revisit these sentences as one progresses, or at least at the time of burning as a farewell of sorts.
What I actually meant was that, if there are to be additional levels, those kanji used in sample sentences that are never taught by WaniKani would be good candidates for addition. 嬉, for example.
(They may not be included in some revered list, but if one can’t help but use them in sample sentences, perhaps there is merit to also teaching them? Also, how does one find out if a kanji in the sample sentence is not on WK? This script.)
Not that I advocate adding additional levels per se which is the topic. There’s that comment saying these sparse kanji could be tucked in to the existing levels instead. That works too maybe not, re: prerequisite radicals, etc. but this is just in the spirit of a lively discussion because complaining is still a must, apparently. Well, maybe not this type of complaining… Back to reviews now.