After seeing folks complain about the new Twitter design for days, I finally got it. Indeed, the meat of the page seems to be lost. After realizing I could quickly get rid of the right side-bar by simply hiding it, I decided to write a Chrome extension so I wouldn't have to go in and do that again.
To install this guy, head to the github repo and follow the README instructions. If you've never played around with Chrome extensions, this is a great intro - an incredibly simple extension that adjusts the CSS on one page. Extensions are really neat, and there's a world of things you can make with them.
The extension will run locally on your machine. If at any time you want to see the side bar again, just turn off the extension (at
chrome://extensions) or click the little icon for the extension and remove its permissions.