Expanding default from email and from label

Currently the Change the Default From Email and From Label an Admin-only function. It'd be great if, as an Admin, I could set these as defaults for my whole instance and all users (one step further would be to make them conditional to the channel tags). Alternatively, have a way for individual users to set this for themselves as default other than their details in ‘My account’? This will prevent some mistakes and save effort of having to update the values on each new email created.