The Times review, by anyone's definition, is not "favorable." As you read, the critique sharpens. If this show were not a done-deal, and a given financial success, this review would be a worrisome weigh-in by a paper needed to validate the production. That's not remotely true, so it's a mere annotation, not a verdict. But it's not favorable overall.
"I'm a comedian, but in my spare time, things bother me." Garry Shandling