Currently all routing node lines are visable when linked.

Suggestion #1: Make route node lines only visiable when holding the Node Router

Suggestion #2: Give the ability to adjust the node line color when overlaping several Node Networks in an area. Color set on the Master Node.

I did the first suggestion in 3f8cccf. The second one will take a little bit more work but was already planned.

I suggest adding a config option to have node lines always visible, I see the benefit of having them hidden but personally I like how they look.

Correct me if I am wrong, but...
https://github.com/WayofTime/BloodMagic/blob/1.9/src/main/java/WayofTime/bloodmagic/ConfigHandler.java#L145
Isn't this the config you are looking for?

Sorry, yep that's it. Didn't see the config option. Thanks!

Seems to be fixed / implemented (at least the make lines not visible, not sure about the color thing).