I saw Van Halen over the summer and Dave's singing was embarrassing. It was just terrible. They had presumably cancelled a show the week before because he was sick or something, so maybe it was attributable to that, but that's not a great excuse. Eddie was

ing on point, though. So overall the show was enjoyable for me. I saw them when they first got back together and started touring (5 years ago maybe?) and he sounded fine.. or I was at least too drunk to notice. Not sure what happened between then and now.
I'm not surprised to hear about a GnR reunion since there is a shitload of money to be made. I saw "GnR" a few years ago and Axel sounded okay. Not amazing, but solid. I would definitely go to the reunion show if it happens.