I've always thought that PR is to role-playing rather like Mansfield Park is to amateur theatricals - and, indeed, having read Peter's Room it helped me with reading MP for 'A" Level no end. After all, our English teacher made it clear to us that Austen enthusiastically participated in the plays they put on in the barn: it's far too over-simplified to see MP as being "The Theatre Is Eval Oh Woah!" And Nicola, of course, is quite happily a Polar Expedition. What I think AF is doing is saying that just like Lovers' Vows is wrong for the MP crew, Gondal is wrong for the mob in the Shippen. It isn't in the least saying this is wrong in itself (which is why the line about plenty of people living at Haworth without turning into Brontes). I think she's warning against hidden agendas, not against role playing per se.