It stops working, not at the first try of course. Sometime when you put some wrong value like forgetting double quotes and then you fix it, it won’t refresh the data. It is not immediate to reproduce.
Regarding the rest, I was using the browser to test, if I need to fire a command line I can directly use the node sdk. The purpose was to use the browser when developing views, one doesn’t want to go back and forth between UI and command line. Plus changing the query values in a text field is much faster than a shell.
Regarding point 5, again talking of the web interface, maybe it works in the shell, but not in the web interface, including double quotes.