I'd like to request a special type of BOM layer which in itself is a container, a set, of BOM layers laid out in a specific order for easy and reliable inclusion in outfits. Of course the ordering is still subject to the layer ordering rules, such as a skin layer being forced to the bottom.
When editing this layer, you drag and drop the layers, and then reorder them as needed.
When done, you can wear and unwear the set like any other layer, the order of the layers included in the set is kept relative to each other within the set, layers not part of the set can fall in between them when worn, due to the ordering rules.