If I have a textblock and write "- ", it becomes a bullet list what is really nice!
But, when I click on BACKSPACE, it would make more sense to go back to normal text instead of deleting the whole block (maybe only for the first item in the list, but I suggest for all)
NOW:
text block
-> write "- " = bullet
-> BACKSPACE = line deleted
PROPOSED:
text bock
-> write "- " = bullet
-> BACKSPACE = bullet back to text
I agree, this would make much more sense functionality wise! 
@wemiprog Thank you for your notice! We haven’t implemented this yet, but plan to do that in the future
Supposedly, this just got included with the latest update I received to the Desktop app. However, it still seems to have the old behaviour. Which is OK because Cmd-Z (I assume Ctrl-Z on Win) performs the desired function, just like it does in Word.