This is what it does:
It tidies the homepage by shrinking the announcements (you can still click on the header to get at the full announcement), and removes the "My Games" black box on the right. I never used it.
It removes the Partners box with the broken link and puts the contents of the Games Forums there instead.
The Tools menu at the bottom
Yeah. Never use it. Replaced with a forums menu. (Hat tip to BoS for this idea).
I also changed the styling of the Characters menu.
Snippets menu (buggy)
This has become buggy - so I need to look at this. This is what it sometimes does.
Add some snippets (keep adding them and it'll create new boxes)
(need to reload the page to get the new snippets to show up - this is annoying - but you only have to do it once)
Add your frequent snippets to posts.
There's no good reason for this to exist. It puts a green dot against people who are online.
Search a thread. It's client side. Your computer is loading the pages and reading them - so it's not fast - but that's all I can do client side.
Shows the results on the same page.