You should be able to prevent the horizontal/vertical overlapping of routed connections . This way the connections should be easier to differentiate.
1. Could this be a setting where there is no overlapping of connections?
2. Even if I use a different color (red) for HoverSettings only the most recent created connection is displayed. At make the selected (Hovered) selection show when clicked.
3. This is a show stopper for us. We might have to try a different product because our clients need to differentiate the different paths (connections) in a complex Diagram.
There is a similar request for this same missing feature in your other products at
https://feedback.telerik.com/Project/143/Feedback/Details/134524-diagram-add-a-way-to-prevent-overlapping-of-routed-connections