Joe, SO reviews only seem to find flaws in the reordings of traditional singers; othrwise they're almost universally rah-rah! As far as" A good review should inform, not merely express the opinions of the reviewer", it's a noble sentiment, but I don't think you can find such a review in the real world. They're all opinions. It's not like judging figure skating (though there are lot on personal opinions sneaking in there)where you get goodie points for how well you conform to a generally-accepted standard.