I find it much easier to read maps when the lines taper in thickness from fat to thin organically like a tree does - trunk, then branches, then twigs. Doing this automatically not manually is also pretty essential because of the intensive labour of editing individual nodes in a huge map. (There are several mindmapping software options which offer this feature with varying degress of success, (iMindmap / Ayoa do it nicely but have so many other problems.) I would love it if reliable Mindmup could introduct his feature.)