Thanks for the replies and apologies for still not being able to quote from posts. Basically, two possibilities are being suggested.
Sister Lucy was a Portuguese peasant girl at heart with strict ideas about obedience and, by the time the changes came in she was too advanced in years to act, despite Jacinta's words of warning to her, as quoted by Marian Horvat. Also, in her cloistered state she would have been largely unaware of the devastation going on outside the convent walls.
But 60 isn't that old and Sr Lucy would surely have at least attended the Novus Ordo Mass and been aware of the liturgical changes. If the convent chapel was re-ordered, for example, surely Sr Lucy would have been aware of it.
The other possibility is that Sr Lucy wanted to speak out and indeed may have tried. But instead she was kept prisoner, in isolation, while an imposter took her place in public.
But what about visits from her family. They must have been allowed to visit at some stage. Which Sr Lucy did they meet?
Still don't know what to think.