I don't understand why you say it breaks the UI. In sailfish, apps consist of main screen, and other screens that are on the right side, navigated forward by clicking and going back by swiping. There is no action for swiping "back" in first/main screen, or other side in the last screen.
Filling that "empty" slot with having an easily scrollable list or useful items, such as channels in irc or subs in reddit seems really clever and intuitive for me. Whole concept of pulley menus is brilliant so why not extend it for browsing long lists instead of having them in a separate and awkwardlooking page?