I haven't seen much talk about this show, which surprises me a bit.
Janet McTeer is an amazing actor -- anyone who saw her a few years ago in Mary Stuart can attest to that.
I don't know much about this show except that McTeer plays Sarah Bernhart. A talented actor playing a highly-charged entertainer can make for memorable stuff. I still recall vividly Faye Dunaway as Maria Callas in a touring "Master Class" -- amazing performance (though it took a few minutes to not think "wire hangers").