First move is easier if you're tall, but can be done by shorties using a couple of terrible crimps in opposition. Pulling the roof, it helps to be small, so it all works out in the end.
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.