1. automatically adding landmarks This is a potential solution to a problem that we think about quite often: it's easy to teach people HOW to place components, but it's hard to teach people WHERE to place components.
We introduced templates to not only help people get started with their notes but also give them an example that they can follow when it comes to making memorable islands.
2. I'm not sure what exactly you mean by dragging a line. Do you mind expanding a little?
Re 2. I mean the gesture of pressing mouse or finger down on an island/hill then drag to another island/hill then releasing to gesture that the two are related. The line I mentioned is just a feedback mechanism. You can also use an outline of the first island/hill. The ideal reaction to such a gesture is bringing the two notes/topics closer which is where my comment about changing location and/or scale of island/hill while keeping the relative direction (angle) constant. I think relative direction more sticky than the other two.