So an update:
My dad’s doing basically the same with slight improvements. The heart stress tests they did this morning and yesterday were better then the doctors expected, so unless the cardiologist says differently for reason, they are planning on starting skin grafts tomorrow (surgery is only done on Mondays and Thursdays). We’ll be allowed to see him before he goes to surgery, so I’ll be bringing my mom over early and then the free wifi abuse begins in earnest. 
He was a bit more responsive/awake yesterday. He opened his eyes and turned his head towards me when I came in and talked to him and when my mom said she wished she could give him a hug, he tried to lift his arms to her. That’s good news all around. He’s been pretty zonked out today, but that’s not necessarily bad.