I’d have also recommended that.
One thing worth mentioning is that if you’re reducing the number of new items per day, it’s natural for your accuracy to go down. Usually we remember the recently learned items much better than old ones. If there’s less new items going around in the reviews, the accuracy will be also lower.
I’d honestly recommend bringing those lessons down to 5 (but maybe not 0, because it might kill your momentum entirely) and continue doing your reviews as usual. It will be tough and your accuracy will take a hit. Your progress will also go down, but that’s okay. By level 30, one knows around 90% of kanji that they’ll see. Your kanji level is at a pretty good level. You should then focus on grammar and reading practice. Maybe join a book club.
I’d recommend against vacation mode. If one is not feeling like doing something, then vacation mode just makes it easier not to do it. I think reducing the WK load of daily reviews by lowering lessons and continuing with reviews is more important here.