This slab has interesting beta for shorter climbers due to the fact that we can't span the boulder like our taller counterparts. The friction is good, and the top is within reach, you just have to trust.... There is a little added exposure too due to the fact that you start off another boulder. It feels high, but the landing is really safe!
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.