Because I became obsessed and listened/watched so many different recordings of Patti and Bernadette I think I've given up trying to defend either because to be honest all the criticism can be true as they didn't always give the same performance. However, I will say that at Patti's peak/best I don't think it's true that she had no nuance, humour or pathos at all. No one brought joy to 'Some People' like she did (which was very different than say Bernadette who ironically tried to be more of a steam roller during the song), she had incredible humour with Boyd Gains (e.g. the scene where they are both on the floor), of course there was pathos for example her line readings before "Everything's Coming Up Roses". For some reason, she decided to throw a lot of it away at the final performance and scream the whole time (e.g. I think the Rose's Turn in particular was horrible). But when she was good, Patti really earned that Tony award in my opinion.
"You can't overrate Bernadette Peters. She is such a genius. There's a moment in "Too Many Mornings" and Bernadette doing 'I wore green the last time' - It's a voice that is just already given up - it is so sorrowful. Tragic. You can see from that moment the show is going to be headed into such dark territory and it hinges on this tiny throwaway moment of the voice." - Ben Brantley (2022)
"Bernadette's whole, stunning performance [as Rose in Gypsy] galvanized the actors capable of letting loose with her. Bernadette's Rose did take its rightful place, but too late, and unseen by too many who should have seen it" Arthur Laurents (2009)
"Sondheim's own favorite star performances? [Bernadette] Peters in ''Sunday in the Park,'' Lansbury in ''Sweeney Todd'' and ''obviously, Ethel was thrilling in 'Gypsy.'' Nytimes, 2000