Currently in order to set a files BOM structure you have to dig into it's document settings every time. It requires 5 clicks to change it.
I'd like to see it available as an option right in front of my face, as it's something I change on various files hundreds of times a day (it seems like it, anyways). An ideal location would be in the BOM editor for assemblies, but I'd like to see it somewhere very easily accessible AND visible at a glance for both parts and assemblies.