EmperorFool
Deity
The advantage of the Glance screen is that you do not need to click on a leader. Everything can be seen at a glance.
Thus the title. I find it extremely useful, and it's an option in BUG. BUG also adds a fist icon next to pairs of civs at war. </BUG-plug>
Do you know what reason there was for this rule [no civic changes in golden age] ?
I may be myself, but IIRC you used to suffer anarchy for switching civics during a golden age, in effect shortening your golden age.
Edit: See Solver's post above.