Alright, thanks for the input.
I will probably get one without center/box pleats. But plain back or shirring? Didn't find much info about shirring when searching for it online.
So for the next bunch of shirts, I will reduce the sleeve width slightly and get either a plain back or shirred back. Thinking of actually ordering a couple as the wait is probably the same anyhow.
Shirred back and shoulders on our vintage shirt