Lightroom Mobile: Allow (as in Google Drive) the option for collaborative editing for teams. Provide at least 3 options: 1) Collection Viewable by anyone with the link, 2) Collection Viewable to specific individuals via sign-on, 3) Collection Editable by specific individuals via sign-on. #2 would require the ability to create a free adobe account. Collaborative editing via LR mobile eliminates the hassles with Catalog syncing and allows for a team to have access to all photos within one user's (Master) catalog. For me, this is an essential feature for usability with my Yearbook Staff.