For me, with Malcolm and now Cliff about to go, it's all over for sure. They were the engine room of the band for 4 decades, along with Rudd, Slade etc. Tightest rhythm section ever imo.
I must say, Axl has been doing a great job on vocals from what I've seen on Youtube. I think they start the US leg of the tour soon, so it'll be interesting to see how that goes.