Thank you for the feedback!
The first point is planned for 1.2 which i hope to launch by years end. It also has annotations and more sharing+storage options. Plus iCloud with an iOS app so you can access the snaps on the phone.
As for CMD+Q, you're right, it needs quit protection - added to list for 1.2.
Yes, but it's standard for apps to ask for confirmation before quitting if there's reason to think the user might not really mean it e.g. there's unsaved data or unfinished operations.
I know you know, but for those who don't: it _was_ standard. Apple nowadays promotes applications to autosave and restore windows with their content at startup.
I think an utility like this should follow that strategy.