1) Numbers should not be moved to the right on the titles (ie follow 87)
2) He changed the background color lighter to show more contrast on the blur, even though bg colors are customizable in twitter, thus creating an unfair comparison.
3) Top black bar items not aligning with the grid may have been intentional. It's not part of the layout but intended to be a separate object that is part of the view port. I'm sure it was intended to seem like the bar was an extension of the browser, not part of the web site. In this way, it does not distract from reading.
4) His contrast with background colors on the "tweet box" area, the feed, and the right side was done poorly, completely breaking the concept of main vs sub content on left and right. The original background colors are much better in clearly segregating left from right, and devaluing content on the right.
Designers forget (esp those with print backgrounds), UX is not simply about making things look pretty, but also being able to trigger an emotional response and create a connection with the end user.
Ironically, Doug Bowman's latest post on StopDesign talks about the Uncanny Valley. This theory applies here too. Rodrigo's design looks way too much like a static blog, and makes me feel uncomfortable.
Although aesthetically pleasing at first sight, this guy still has a lot to learn from Doug Bowman.
His design honestly looks like a Wordpress Blog theme, not Twitter.
I don't think the problem is 'to-the-right' as much as 'on-the-right-margin'. Lots of tests show keeping values closer to their labels speeds comprehension; with a left-aligned label, and right-aligned value, and varying whitespace width between, interpreting the numbers is slightly slowed. (For example, in the redesign, the number of 'Following' is actually closer to the label for 'Followers'.)
Although I agree 100% with your critique I disagree completely with UX being about triggering an emotional response.
I know UX people like to claim they are responsible for the user experience but this is really not true unless they are able to actually visually design the site too as the visual part is the primary emotional trigger.
This is why all UX people should be able to design.
The problem with his twitter redesign isn't about the emotional response but simply about the information design. It's badly done and reduces the ability to scan the page.
I think so too. It always confuses me when I see companies look for UX and UI as 2 separate things. The more layers of designers you introduce to the process, the more likely it is for the main concept to be lost in translation. I like Twitter's model where designers work together as an extension of a Creative Director with skills in UX/UI/Front-end.