If you want to read an intelligent and more accurate review of Nelson's work, I suggest here:
David Barbour writes: "Because of the large and densely interrelated cast of historical characters, many of them obscure, and also because of its deliberate pace, Nelson's play has been criticized by some for being a snooty, undramatic piece of work. To my mind, this is nonsense; Nikolai and the Others is a literate and richly detailed piece that demands, and rewards, the audience's concentration."
I agree. NIKOLAI AND THE OTHERS is extremely satisfying theater.