Hey everyone. We're considering simplifying how we do keep track of what you're learning. Bottom line is, you wouldn't be able to stop learning a set of characters by disabling a list. So for example if you add a bunch of characters from the Radical list, but then decide you don't want to study radicals, you wouldn't be able to just turn off the Radical list and all associated characters and tones in one click of a button on the vocab page.
This would improve things for everyone in a number of ways, especially going forward. It would simplify and speed up our code a great deal. It would make the number of items to review completely accurate all the time (as opposed to now when it might be including things that the system hasn't yet figured out have been ignored). Simplified code would also make the system more stable, and we could focus more of our time on other things. One other problem is the current system is not very scalable, so we would have to limit the number of lists you could have enabled at any one time, which I think would become frustrating when we have many more lists available, as well as custom lists.
And although you wouldn't have that high level control over what you are studying, you would still have other ways, and soon more ways, to exercise control. You will eventually be able to go through lists section by section and choose items to ignore. You can always ignore things on an individual basis while you study them. And you will still be able to choose a subset of items to study with Cram Mode (which I plan to expand and improve later as well).
So we want to make sure this would not be a major disruption to our users. If it's important to you guys, we'll try to figure out a better way to keep it. We could also use suggestions for alternative ways you could control what you are learning. Let us know your thoughts!