Here is the current list of shortcuts we are working to implement in the new editor.
Let's use this space to capture suggestions.
Note: Shift-tab isn't yet implemented, but it's planned for the very near future.
Attached is a text version.
If you mean, are the shortcuts still active: yes, they now can be seen from within the subtitling tool.
If yu mean, is this discussion still active: yes. All suggestions and reports of possible (though hopefully rare) issues are welcome.