This has been suggested before, and was denied in 2016, after checking
The idea is simple
Move all of the sidebar game actions over to sidebar player actions
This way, you can have sidebars show personal info, like levels and stuff
This was denied because it was "hard to program", but now we have K_Sasha and S4nders, unlike in 2016, so I was thinking that might change it up a little bit!
You could still get the same effect of scoreboards as the game action by setting the action to all instead of default