Better threading for sure. The current interface is pretty good, but it makes it hard to keep track of multiple back-and-forths and oftentimes drops tweets from threads.

Indeed, navigating any discussion on Twitter feels like a complete mess. Imho some quirks it has in a browser are really annoying, like closing the conversation you are looking at when you click somewhere outside of it.

Happened to me plenty of times that I misclicked and closed a discussion which I had been very deep in, so I had to open it again and scroll&click my way back to where it originally closed, way too much wasted time over a simple wrong click.

- going back to a 'reproducible timeline', I want to see each tweet by each person I'm following, in the right order

- I don't want to see tweets by persons I'm not following, unless they are retweeded or part of a thread

- navigating the time line is a mess, sometimes the timeline scrolls to the top, and it's generally very hard to continue where you left

- better thread visualization

- clear distinction between tweets I've already seen vs 'unread tweets'

- some sort of bookmarking or 'read later' for tweets

- let me add tags to tweets and persons (I mainly want to add company or topic tags to people, for instance 'this is the WebGL guy at Apple')

[edit: formatting]