I would not have wanted my Dad to go slowly - he was a very proud man, and he couldn't have stood anyone taking care of him - but I wish I had been able to spend more time with him, say the things we never said (feelings were not freely shared in my family), and especially wish I had said "I love you" and head heard the same from him. I know he loved us, he was just not the kind to say it. I have learned a lot in the 20 years he's been gone about not missing the opportunities to tell, and show, how much I love them.
I am sorry for what you are going through. You and your family are in my prayers. I hope you have a Happy early Thanksgiving, and cherish every moment you have with your father, even though it's hard now. You won't ever regret what you've done for your parents.