As Ctrl + B and Ctrl + I are used for bold and italics, it would be great if Ctrl + Shift + B and Ctrl + Shift + I could be utilized for the Strong Emphasis and Emphasis character styles, as this would make it easy to remember and learn the shortcut.
Presently these shortcuts are utilized by Subscript (.uno:SubScript all apps) and Select Text (.uno:SelectTextMode only in writer), so i was thinking that Superscript and Subscript could be switched either Ctrl + Shift + equal and Ctrl + equal (MSO) or Ctrl + period and Ctrl + comma (Google Docs), and we could find a suitable alternative for Select Text.
Somewhere I've seen (and used) # and + for sub/superscript. Maybe it's the default shortcut in German as those two buttons are located left of return. With equal I'd have problems to remember but ctrl+shift+ +/- could make sense.
Besides that I think the change is a good idea.