[foxhop]

I think a better twitter would literally be twitter but instead of a feed, it would be a dashboard of all your follower's most recent tweet.

Then if you get bored you can click on a username to view a complete (chronological) feed.

[foxhedgehog]

If twitter let you filter tweets and easily build lists around users, it would be most of the way towards being a more functional platform that let you easily finds signal amidst noise.