Australian rock group Airbourne vocalist Joel O’Keeffe talked about the AC/DC’s line-up changes and evaluated the new members one by one.

He spoke in an interview with MariskalRock TV and said:

“Look, so the tour was called ‘Rock Or Bust’, so it’s either ‘rock’ or ‘bust.’ It’s AC/DC, so they’re gonna go ahead and they’re gonna rock. So then, before the tour even starts, [drummer] Phil Rudd, unfortunately, can’t join them on tour ’cause he has some legal commitments back in New Zealand, and they have to get Chris Slade back in the band. He hasn’t been playing with them, but they’ve gotta quickly rehearse and get on the road.

Angus [Young, AC/DC guitarist] already has the biggest balls in the world by going out there for the first time without his brother [Malcolm Young] his whole entire life on the biggest tour that they’ve ever been on. And then so they go ahead on tour, and then Brian [Johnson, vocals], unfortunately, has to leave. And then it’s either ‘rock’ or ‘bust,’ so AC/DC keeps going; they don’t wanna let people down. They keep going.

And then, of course, Cliff [Williams, bass] now has left, and then now it’s Angus and… Well, I don’t know who the bass player’s gonna be. Is Axl [Rose, Guns N’ Roses singer, who filled in for Brian on a European and U.S. tour] there anymore? I don’t know. I heard Axl did a good job. That’s what a lot of people said — that he sang the songs well.”

You can watch the entire interview from the below.