I agree.
"Church influence" is funny in this case, since presumably it comes from records. I'm not sure of how substantial the pentecostal saxophone scene was in East Sussex in the mid- to late-1960s, but I'd guess that the answer is 'not very'. Where did he first come across this stuff, and what other records are there that influenced him? Vernard Johnson is not exactly a house name of here. One thing that I don't hear much with Butcher is an Ayler influence, which is where you would have assumed he would have started from.
It's a good record by the way. Very enjoyable as breakfast music, even if my wife is a bit less tolerant of outwardly churchy music.