Being able to add a "Files column" under the "Deals List View". I think it should look like the activities column, where you can click the button and it pops up and shows you all the activities. But in this case, when you click the file button it pops up and shows you all the files attached to the corresponding deal.
Tori Leone commented
Yes to this idea, I'd also love to be able to use this to filter down which deals have a file attached vs which ones do not.