I was listening to Max Ambesi's podcast with Angelo Dolfini, and they talked about the Evgenia situation too.
Dolfini said if he was in her shoes, he would not risk worsening her condition by skating at GPF, since she has already won it twice. Ambesi agreed, saying that even if the others are getting closer Evgenia still has a good margin over them. He also said that he believes that Evgenia will decide to skate anyway and will manage - whether that's for the best, he said he didn't know.
imo, for her reputation is better not to show up than to skate and not win. If she doesn't go to GPF, people are going to assume that whoever will win will have done so because of her absence. If she does go and underperformes due to her injury, people (and herself) might start doubting her as the OGM favorite. Just my 2 cents.