It would be nice to be able to tie the project weight to a loop instance. Sometimes I'll see projects with one weight that's a "global" weight and another weight that's a "country-specific" weight. I've also seen things like one weight for "Global w/out China" and one weight for "Global with China" (for example). Even though many times it's possible to combine all weights into a single field by re-proportioning, I think it would be useful to define separate weights for each loop instance.