No worries! Your replies are almost always helpful so please keep it up! 
cheers!
Oh whoops, okay thank you. Is there no button to get to it then?
It’s still in soft launch mode, so they basically test running it now.
The only way to use it is to bookmark/favorite it in your browser and type part of the url, “wan” or “less” or “pick” should do, and choose its url or click the thumbnail every time you want to choose your lessons content on your own.
That’s what I’m doing.
They’ll probably integrate a button in the dashboard when they’ll officially launch it.
I think it’s a great feature that solves a lot of complaints some people had (have…) over the years in one place.
You need to have lessons to have lessons.
Ah, I guess I couldn’t express myself very well. I found the lesson batch size selection in the app settings. Thank you for your reply.
Gotcha, thanks.
I worked for a few years at software companies with a very data-driven culture, we used to measure everything. One of my takeaways from this is that there is such a thing as being overly data-driven, because doing the correct analysis of the data can be very hard and requires well-trained professionals in the particular field of data science. So if you’re trying to get data to justify every product change (which is what we tried to do over there), you end up investing almost as many hours in analysis as in actual development. Also, humans like to take shortcuts, and if the analysis is not meticulous enough or you don’t have enough data scientists, then you can find the right data to justify any decision. Eventually, if you have a product vision, it’s usually better to make small tactical decisions based on vision and intuition than trying to be data-driven all the time.
And this change does sound to me like a minor decision that just makes sense.
I hope I didn’t talk too much
talking about data and learning Kanji.
Wanikani possibly has a treasure trove of data it sits on.
For example
what are the completion rates of someone who passed level 30? (% of people who stop using wanikani before reaching level 60 according to their levels)
what is the impact of taking a break on completion rate?
Percentage and raw numbers of daily visitors who make it to 60
What about the other visitors.
average daily time active on the site from those that make it to level 60.
What pages did they spend most time on apart from their reviews
Which addons are popular by those who made it to 60?
Thanks for the comments! Let me try to answer the different points and add a bit of clarification:
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These changes are based on our interpretation of academic research (for example by Bjork and Bjork) and user feedback, not WaniKani user data.
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Our priority with batch rounding is to avoid batches of one item, because doing one Lesson and then quizzing that one item right away creates zero spacing and you’ll probably get it right without having to think about it. Having two in a batch isn’t great either, because it’s still pretty easy, and you’ll quiz them in the same order you studied them. Three is better, so if three works for you, stick with that! You could also try out larger lesson batches as you progress, because the bigger the batch, the bigger the challenge, and (so the research on desirable difficulties suggests) the stronger the memory. Motivation and habit building are equally important, though, so I won’t dictate the Lesson batch size that works best for you.
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Batch rounding only affects you if you clear out all of your available Lessons. You can still set the number you want to do in each Lesson batch, and we’ll respect that for every batch until you start to run out of Lessons. In other words, we’re just dealing with stragglers in a different way: we used to leave them in a small batch on their own, which didn’t match your batch size preference either, but we now combine them into a slightly bigger batch. The difference is that the final batch will now usually be a bit bigger, whereas before it was (sometimes much) smaller than the number you set.
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As for the Lesson Picker, we haven’t officially launched it yet because there are other pieces to the puzzle that are still in the works, but we plan to link to it from the dashboard and hopefully announce it soon! For those of you who are more advanced and would like to customize your lesson batches, feel free to try it out if you haven’t already (as long as you have available Lessons - the link won’t work otherwise). We’ve been using it internally and it seems to be working well, but if you come across any bugs, we’d really appreciate an email with the details to hello@wanikani.com. I just want to stress that the Picker is aimed at advanced/power WaniKani users, so I don’t recommend using it if you’re just starting out.
Hopefully that covers everything! 
P.S. It took all my strength not to replace the Bjork research link with https://youtu.be/F1IO-OQu3wk 
Thank you for the thorough response. I’m not sure I read the research in the same way as you (I think there’s valid reasons to consider the “learning phase” (encoding) and “review phase” (retrieval) different beasts.), but I appreciate how candid you are. After having started using SuperMemo I’ve had my assumptions about the ideal way to SRS challenged many times. I think you’re very right that drive to learn (habit/motivation) is important in this equation and very variable from person to person.
WK is very far from a super-efficient SRS (from all I can gather), and I’m sure there’s a lot of potential for improvement (and especially given the amount of data you’ve probably amassed). One example could be having timings change based on how quickly people answer the questions (proxy easiness factor). With that said, like I mentioned above, WK works perfectly fine as it is. The great things about WK (ease of use, mnemonics, fact-checking, quality, lack of having to do backups etc.) far outstrip what peeves I might have, and as grumpy as I might seem, I do genuinely appreciate the product. I’m sure I’m not alone in this, and it’s probably why you get such spirited feedback when you do make changes.
TL;DR: 
Ok, those first two paragraphs read like something out of one of my quantum mechanics textbooks.
But anything that helps with my retention is fine with me.
Wait, what was I talking aboout?