Script Summary: New Twitter minus the visual clutter (recommended users, trends, definition). Inserts "old school" RTs. Better column sizes. Looks great from 1024x768 and up.
[UPDATE: 15 Feb 2012]
Oh jeeze. Where to begin?
Ok. I've had a look at "New Twitter", aka, Twitter, the latest incarnation.
Several things are problematic:
a) Many fields are loaded via ajax after page load (ie, they simply don't exist when the greasemonkey script is run)
b) Many of the cluttered side bar items don't have distinctive ids or classnames. See issue a) for why I can't use js to navigate up or down the DOM from the bits that are (sort of) identifiable.
c) Some fields use the same classnames for very different purposes depending on which page you're on (js-sidenav-link, profile-nav)
d) the new direct messages window is too painful to fix without major re-engineering (eg: Adding the ability to resize the tiny window. Adding links to load the user profile so you can follow/unfollow without having to exit DMs. Remembering where in the list you were so you don't have to keep scrolling down to read your next message. Adding next/prev buttons to replace the painful "click message-read message-click back-scroll down-click next message" cycle)
e) in order to make the page usable on smaller screens, the whole thing needs to be reworked. Specifically, the huge wasted space on the left (if the components are removed) - and doing it in such a way that it doesn't look ugly as hell (at present it's nicely aligned with the header)
There's a few other things, but those are the main impediments.
In short: New Twitter is too painful to fix. I'm just going to write my own client so I can avoid it completely. It'll be faster.
Sorry to let you down, guys.
This is genuinely frustrating. With the exception of the DM box, the general trend of the new interface is very positive. It's a lot cleaner and less noisy. There was actually very little I felt needed tweaking, and certainly much less than earlier versions.
ps. have uploaded where I got up to so someone else can continue if they want. It kinda works, but it's still quite broken in places and is full of debugging code.
Minimises the visual clutter of New Twitter (the Twitter web site).
* Invite a friend (New!)
* Recommended Users
* User Recommendations
* The "Witty Definition"
* The Activity sidebar
* Old Style RT button (where you quote the user & add your comment)
Makes the main area much larger, and the dashboard in the sidebar much smaller.
Optimized so it works perfectly at 1024x768. Higher resolutions are always better, obviously (so you can see more!).
Adapted from "Old New Twitter", by yauhui.