Yes. And new kanji too! For example, when I joined in 2016, there was no 喉 - then it was added. Another one that comes to mind at once - is 叩。
Many radicals were renamed once (I hope this particular thing won’t happen again though, it was quite problematic to relearn them even though they are better then the previous ones).
Mnemonics get changed for better ones from time to time too.
Also,
I’m really looking forward to this one.
In other words, yes, WaniKani keeps getting better, it’s truly a great resource!