Here a quote from this article that shows how he completely missed the point.
“There’s also just an adjustment because Luke is different,” Johnson continues. “He’s not the same as Obi-Wan, but he’s the Obi-Wan of this trilogy. He’s not the Luke of this trilogy. More than that, where he was coming from in The Force Awakens meant that it would have been weird and dishonest to just have him be exactly the way he was in his twenties. Obviously these 30 years have changed him, otherwise he wouldn’t have exiled himself on that island. So there was a certain amount of asking where his head is at now and why is it there. Mark was maybe coming into it more expecting what some of the fans might have been expecting – that it was just going to be 20-year-old Luke, except with a beard [laughs]. Because I respected the character and wanted to take that character’s arc seriously to figure out why he’s doing what he’s doing, it was never going to be that.”
You ignorant jackass. Luke is still Luke. All three trilogies are the Skywalker story. The original trilogy and the prequel trilogy never concluded. I'm sure the new trilogy will be awesome with this guy at the helm.