Ability to add a list of items, rather than a single product, to a bundle.
Add in a feature that allows you to make a list of items that can be added as an option to bundles.
Alternatively, allow adding a category, rather than a specific list.
For clarity, what I mean is the ability to pick one of a selection, rather than just an item (i.e. one pair of a selection of glasses, or 1 size of a selection of sizes of tubing/hose/pipe/whatever)