I did this at the Betty meet up in October. We all used different holds to top it out- some went straight up, I moved left because I like those layback moves. I don’t think it changes the grade but thought I should mention it.
Rain sucks, but broken holds suck even more. Remember, never climb on wet rock in Fontainebleau.
The sandstone becomes brittle, and pulling on it will ruin classic problems. Drying it doesn't help, because it's still wet and weak inside.
All you can do is wait for better conditions.