My eye likes the background around Mary, but not the lower background to the Crucifix. However, I think I understand what the architect / artist was going for: The universe is peaceful and beautiful, but Christ's death on the cross for our sins was a radical, disruptive event.
It was especially that background behind the cross (jagged color blocks) that struck me as 20th C stuff clashing with the Mary portrait.
Back in elementary school, in the late 60s, we had a common drawing project where we made black loops and curves on the page and filled in the resulting spaces with colors, so as to look psychedelic. The curvy color blocks where the angels are, and the jagged ones behind the altar, remind me of that.
I’m just really over the 60’s. But don’t mind me. Obviously I have a bee in my bonnet over something much less momentous than the Pope’s news, and not worth bothering about in the long run.