new suggestion (#367)
I mentioned it a some time ago. http://bit.ly/1lenA85
1) In mixed diagramm too many elements and should exist feature to collapse them all.
2) And set icon mode (and other stuff) for all for one times
3) large icon is too large, and small is too small, middle size as something between should exist.
4) ToolTip is required for icon mode of elements. Without it it's more difficult ti find needed element.