In Lange’s (partial) defense, with the way O’Neill wrote the role of Mary, it’s an extremely tricky role to get right, without engaging in melodramatic scenery screwing.
Between live productions and pro-shots, I’ve seen Lange, Manville, Metcalf, Redgrave, and Elizabeth Marvel - and actually Metcalf and Marvel were the only 2 who gave performances I liked.
But to the person above who said they were surprised by the comments about disliking Lange’s performance: I am too. At the time, it was almost all high praise from this board, and she was considered a lock for the Tony. People who disliked her are in the minority, but I guess we just happened to come to this thread first.