Some projects (like mine) use collections to separate some data realms. Users are free to create a new realm via API and we in turn create a new collection (one per realm). The problem we have is that we need to have a separate component that creates a set of indices used by our app as the API itself does not know them. It would be handy if one could specify a set of indices for all newly created collections within a DB (instead of just the index on _id).