The redesign can still hurt snapchat even if no users leave. Personally, before the update, I would look at the snapchat discover stories every day. Now I find the page so appalling to scroll through I don't navigate to it anymore. I think this is a large part of their business model, otherwise other companies won't purchase slots in the discovery page. It just depends if my experience is a one-off or if it holds for a decent percentage of snapchat users.