It's not just the "layout" that got changed, it's not a skin or something. The whole site was remade, and there's no going back from that. What you can do however, is suggest features to be added or brought back.
Petitions won't change anything,not even this. leon was right,let's see what are the things we can work out from this new heap,first we have unearthed union boards which were created long way before,but nothing else as of this time.just deal with it! you can't bring back what was gone a long time ago(not including personal experience obviously)