Probably you're right and the old layout was better..idk it yet
But the new one opens up a few new possibilities as well, they not just changed the design!
"New design
You will now find @mentions, retweets, searches, and lists just above your timeline - creating a single, streamlined view on the left of the screen. On the right, you can see the features you're familiar with, including whom you recently followed and who recently followed you, favorites, and Trending Topics.
View photos, videos, and other media content
Now, it's easy to see embedded photos and videos directly on Twitter, thanks to partnerships with DailyBooth, DeviantART, Etsy, Flickr, Justin.TV, Kickstarter, Kiva, Photozou, Plixi, Twitgoo, TwitPic, TwitVid, USTREAM, Vimeo, yfrog, and YouTube.
Discover related content
When you click a Tweet, the details pane shows additional information related to the author or subject. Depending on the Tweet's content, you may see: @replies, other Tweets by that same user, a map of where a geotagged Tweet was sent from, and more.
Mini profiles
You can click a @username to see a mini profile without navigating from the page, which provides quick access to account information, including bio and recent Tweets."
There's no point for crying about what you cannot change, instead you can dedicate this time figuring out how to make these changes to your advantage
BH IM is all about adapting to the changes from day by day, because there's no absolute stability, just dynamic, which means that only one thing is permanent: the changing!