I've watched a few clips on YouTube.
I watched the Tool set. The sound wasn't great, at times the vocals were a bit buried. But then it's a support slot. Otherwise, a good set. I could listen to Danny Carey drum all day.
I watched various clips of Sabbath, and it sounded great. Ozzy, considering his health issues sounded fine. Iommi, Butler and Ward... power house. I'd also been watching Geezer Butler talking about his rig for the show. What a decent guy he is. I've never listened to Black Sabbath much, but I would have rather gone to their farewell than the other event on that night. They created a genre, they innovated and this was their farewell.