Caveat: I work for Canonical and the Ubuntu Community Manager, so I understand if some folks think I am a little biased, but these thoughts are my own and not those of my employer. Take with as many pinches of salt as you like. :-)
Before I became a community manager, I used to be a journalist, and I used to do reviews of software too. Reviews are always complex beasts, and it is tough to get a good balance between the goals of the application, how well it performs, and what my recommendation would be to my readers. I see the responsibility of the reviewer to balance the needs of the readers with the capabilities/deficiencies of the software I am reviewing. As I read your review I was constantly thinking how I would approach the review myself, if I had not been a member of the Ubuntu Platform Management team.
I can't help but feel that the review doesn't particularly represent the needs of potential users of the product as well as it could. Ubuntu 11.04 is designed for a mixture of end-users, consumers, enterprise users and enthusiasts. It has a strong focus on usability and great design, and it's goal is to provide a simple and predictable user experience. Unity is a key component in that goal, and admittedly, it was a ballsy move for us to ship Unity in 11.04.
Your review seemed to highlight a few core themes - Unity shows promise, but it is buggy, the scrollbars suck and the lack of an RC made it feel a bit shonky and unfinished. While no-one is going to doubt that there are still some bugs in Unity - it is a new release, and generally .0 versions always have some bugs, your review didn't really go into detail about how well it serves the needs of end-users. How well does it let you discover and load apps? How well does it let you find your files? How does the experience differ from the Ubuntu 10.10 experience? How well does it perform on desktop machines as compared to netbooks and with different graphics cards? How well does Unity perform for common tasks for most users - creating documents, finding and loading files, watching videos etc. How does Ubuntu 11.04 compare to other Linux desktop distros (e.g. Fedora / OpenSuSE / Debian) and how does it compare to Windows and Mac OS X? I am not saying your review or your conclusions is and are wrong, it is of course your own perspective, but it feels incomplete and presenting readers with a good range of content that explains how well Ubuntu 11.04 does and does not serve their needs.
As for the scrollbars, I agree that the lack of consistency across all apps is less than desirable, but I also don't really think it is that big of a deal...it is a scroll bar. The lack of consistency doesn't inhibit the experience and is highly learnable in a short period of time and t I think that when people are used to them it does provide a cleaner experience with less chrome in the way of apps and their content. In a nutshell I just don't see why the scrollbars needed quite so much content in your review - I just don't think they are that big of a deal. :-)
Finally, in terms of the lack of an RC, this really doesn't bear that much in terms of the final quality of the product - whether it is called a Beta 2 or an RC doesn't fundamentally change the core quality process that goes into each release - the same engineering team, release team, and management are keeping an eye on things - the Beta 2 was added mainly because we did expect more bug-fixing and an RC would not have been an accurate description.
Thanks for the review and it was an interesting read, I just didn't feel it represented the product fully and the needs it serves for our users - I am not saying that a more detailed review would change your mind...you may end up with exactly the same conclusion...but a more exhaustive review would make me feel like the final conclusion had more weight and credibility behind it.
Just some feedback.