I want to be able to use folders and sub-folders. I use strongbox on iOS which is based on keepass. It allows for as many folders and sub-folders that you want. I use folders to keep my stuff organized. I don't like having all my passwords and whatever in one big long list. I also using keepass as a bookmark manager. I really like the idea of your "vaults", but again I have over like 3000 bookmarks and folders are really needed. Also attachments with built in viewer is also important. I like to convert a lot of websites to PDF and store them as attachments, so I can view them later. Keepass is the only one that can view said items, everyone else you have to download said item to view the attachment.