How desperately sad and lonely he must have been. I know from experience that if you are in that kind of state you can't reach out to anyone anymore, so, no, we couldn't have done anything more for him. We all have to accept that sometimes you just can't help people, much as you love them. No one is to blame, and least of all Paul.
It's so very, very sad and it's all I have been thinking about all night. I hope the concerts will go on next week and that somehow we can turn it into a tribute to Paul. It hardly needs saying, but Neil (and Tim), if you are going to postpone the concerts you have our full blessing!
My condolences to his family and I wish everyone involved a lot of strength and wisdom.