Actually you right. Rizzoma have too complicated UX. In couple weeks we are going to release new version of our interface and I hope it will much easier in user perception
Browser "back" should work in the same way. (every topic has own link). Our back button has different feature it play your last changes back (like back button in ms word). May be we should change the icon?
Cool we definitely has a problem with: "A lot of menu options aren't visible until you click in certain areas". I hope new version of interface will solve it.