90° relation between free topics not possible

I am trying to build relations between free topics in a 90° fashion. There doesn't seem to be a way to do this. What I get is something like this:

There is no way to get rid of the 3rd lower horizontal line and just have a vertical with an arrow ending downwards on the rectangle. Only workaround is the free line style, but that is very, very cumbersome and it doesn't snap to any 90° angles.
This is very time waisting.
Does XMind consider to improve on such basic flaws?

• More line styles
• Snapping to 90° for free lines
• Lines with flexible number of sections.