(named after Upland, IN where those features were first demonstrated at CCSW:2016)
1) New Visible Stepping Feature adds slider for controlling slowed down visible execution, where blocks and input slots highlight as they are evaluated. At the slowest setting the execution pauses after every step, so the user can click on the new "next step" button and thus manually single-step program execution:
2) Speed-up execution of non-warped custom command blocks by factor 2 (by making sure they evaluate in a single frame and not over two frames as they used to)
3) Many improvements to text-editing contributed by Bernat Romagosa (@bromagosa).