In this day and age when we've got access to such a wealth of
information I don't see how a professional writer can be excused for
not knowing about the performers and the work! Why are they writing
about this subject then?
It's important to know about the production, yes, but I think a couple
of condensed paragraphs are ENOUGH. The writer could just mention if
it's a new or old production, whether it's regie or traditional and a
few key details to give an idea of how it looks and how s/he thinks it
works and maybe mention whatever metaphors we are presented with in
the case of regie (or leave us make up our own minds, I think most of
us have the imagination to do so).