I feel like there should be a setting called something like "Nostalgia Mode". You could pick a year (2008-2010) depending on what year you chose (lets say 2008) the site would turn to 2008's layout. Everything would operate the same, new buttons here and there, pets of whatever month and year your in would be the same, except all in 2008's layout design.
It would be cool to play CS like this:
Anyway, reply to this and let me know what you think. I think its an awesome idea though.