I have personally put much thought in to the pros and cons of flagged revisions as currently defined. One of my greatest concerns is the nebulosity around exactly what the trial will incur, and whether it is merely a trial that can be reverted or a fiat. This point in particular needs to be addressed affirmatively so that the community can at least move forward without doubt hanging in the air. While the straw poll is merely that, a "feeler" for the community's opinion, as it currently stands, there are many who oppose and consensus is not reached. A trial on a limited number of articles also cannot address the problems of scale, so I don't believe that it should be called a trial, since it would not be an effective measure of viability.
I am fully cognizant of the liability the project faces when dealing with BLP's that are less than factual, but my concern is that flagged revisions will ultimately do more harm to the project in the long term. Wikipedia's core principle is "the free encyclopedia that anyone can edit". It's on the Main Page, and has been virtually since it's inception. Flagged revisions are being used on the German Wikipedia, with mixed results, as stated by some of the administrators from that project. Flagged revisions would be effective if the care is taken to check for vandalism before sighting, but with a project the size of this Wikipedia, I have my serious doubts. A significant backlog seems almost inevitable, with one solution for German Wikipedia being the use of bots to sight articles, which obviously has potential defects as compared to an editor sighting the article. Other concerns are how it will impact the project to those who want to contribute, but will discover that Wikipedia is no longer the "instant gratification" that allows their hard work to appear immediately. There is also the question around who will be provided the necessary permissions to sight articles. I am not at all against the concept of some method to reduce liability, but liability will not miraculously vanish with flagged revisions. The sole solution to removing liability for inaccurate BLP's is by shutting down Wikipedia. I respectfully disagree with those that believe that flagged revisions is the "magic bullet" that would remove all liability.
The other concerns are more on a forward looking basis around how Wikipedia will present itself to potential and existing editors. With the implementation of flagged revisions, nobody other than those privileged with sighting flags will be able to edit the live version of an article. This in particular holds many dangers in the approachability of the project to an editor. I would certainly not wish to devote time and effort to the writing of content when there is no guarantee that my work will ultimately be shown. German Wikipedia has experienced a significant reduction in the number of edits to their project since the implementation of flagged revisions, and considering that this Wikipedia is also currently experiencing a decline in editing activity, I am concerned that this alone would ultimately be a fatal blow to the project.
To summarize, flagged revisions are an imperfect cure to a difficult problem. We already have existing tools in place that can mitigate the damage being caused that do not alienate the core group of editors that have made Wikipedia what it is. I must therefore respectfully urge that flagged revisions not be implemented in it's currently defined iteration, and that all concerns raised be weighed on their merits.