more than would otherwise be the case

It is certainly true that individuals who are concerned about a traumatic event, such as the threat of the loss of a loved one who is sick, will dream about that loved one more than would otherwise be the case.

Question 1 : Where is the subject after 'than'? Is it omitted? if so, why is the subject omitted?

Question 2 : What role does 'would' do? I can't understand why 'would' used here. Please, give me a detailed explanation.

Question 3 : What is the exact meaning of 'more than would otherwise be the case' here?

Since the beginning of time, the mysterious nature of dreaming has led people to believe that dreams were messages from the other world. Dreams have been regarded as prophetic communications which, when properly decoded, would enable us to foretell the future. There is, however, absolutely no scientific evidence for this theory. It is certainly true that individuals who are concerned about a traumatic event, such as the threat of the loss of a loved one who is sick, will dream about that loved one more than would otherwise be the case. If the dreamer then calls and finds that the loved one has died, it is understandable for him of her to assume that the dream was a premonition of that death. But this is a mistake. It is simply a coincidental correspondence between.....