you can always soak the rockwool in a new stable nute solution and see if that helps

as long as the dome is letting light in umm if you notice a lot of drops on the inside of the dome that will diminish light but without that I'd say yer good

sometimes the beans have an issue with breaking through the tissue that holds the first 2 leaves together if you can pry that open they usually fair much better but be warned that it is very delicate and a wrong move will cause death

best bet is to wait up to a week after popping from the ground before trying anything that drastic