Over the years I've read and participated in some very interesting discussions about prey size, including many on this wonderful forum. From those discussions, about 2 years ago we decided to stop offering our BPs large feeders. We now offer 1 small or small medium once/week while they are eating.
I doubt we'll know if this helps in their long term health for many years (most of our BPs are <10 years old) but I do think they tend to stay on feed and eat more consistently with the small feeders.