Thank you for those remarks!
1 – A comment block will be added in the next software upgrade (V2.0 July)
2 – There is no way to make a breakpoint in the blocks. However, a workaround is to connect some digital pins on the back of the robot, and use the “Get Pin State” block to block until the digital pin switches to 0 or 1.
3 – You should be able to copy the XML and the Python code from the sequence tab (when pressing “show”), and if you click on the “edit” button, you can paste a new XML. The behavior you have is not normal, what Operating System are you working on ?