In their original blog post, they mentioned the sliders that let you adjust the amount you give to Humble, Developers, Charity and Partners would be replaced with a static two-tier system that was giving a lot more to Developers and Humble. Now though, in a fresh blog post they're backtracking.
Today, we’ll be turning sliders back on for all customers on our bundle pages while we take more time to review feedback and consider sliders and the importance of customization for purchases on bundle pages in the long term.
It seems they've learned the hard way that rolling out big changes to their original business model, while they're a smaller store isn't going to cut it without a lot more thought put into it. The new bundle page style is still going to be rolling out that they showed off previously, but it will still have sliders.
Some things will still change in future though by the sounds of it, as they will be "exploring different approaches to the sliders and how splits work, along with new ways to incorporate charity into other parts of the user experience" but they will be sharing more and gathering feedback in future instead of just doing it.
As a Humble Bundle Partner, we're glad to see that they're willing to listen.