I think you should be able to change settings from the app, or a web browser on your phone. For example I need to change my gallery settings to show the filenames, because by default it’s hidden. I can’t do this from a mobile device on the website, or the app. Also, would be nice if you could generate gallery download links from the app, or on mobile device web browser.
Arno Hoogwerf commented
Maybe better will be to make it possible to save your own default gallery settings, so you don't have to change them every time you make a gallery.