I'm not a doc, first of all. But both of my parents, one living one not, had a variety of heart issues, including many your dad has. If I were a doc, first question back to you is, what do you mean by "recover", that is, what are your expectations. Virtually everything you list can be 'managed' with proper behavioral change and medication. My mother totally disregarded advice to take her meds, have regular checkups,stop smoking,avoid binge eating (and drinking) and manage her stress. Her cardiologist of 20+ years told her, in her last week on earth, that there were no longer surgical miracles he could perform. Straight shooter that he was, he basically said her behavior had caught up with her. She died four years ago of congestive heart failure and emphysema.
My father on the other hand, is the opposite. He's had 2 quad bypasses, 3 carotid surgeries, pacemaker, several strokes leading to vascular dementia, and now ALZ. On meds, and with regular care, he's holding his own nearing 87. Can he do what he did? of course not, but he's got the right attitude. Your dad can recover too - physically, psychologically and emotionally if he takes care of himself and lets others (docs and family) help. But you must also be ruthless in researching his conditions, his drugs and proposed therapies, and be prepared to take on the health care system if you feel something isn't right in his care, or his participation in and response to it.
good luck and hope you have many more years with your dad.