Did you notice a change in how the saddle cupped/fit/comfort?
Also, I was listening to that trad bow hunting podcast and an arborist on there said ropes for bridges, particularly amsteel blue, I know you said predator, are not good bridges. They are not meant to take friction. He suggested a webbing bridge. I might build me one like DIY sportsman out of some strong doubled small webbing.
as far as having two ropes on one side, yeah, that'll be tough. I climb with a LWHC so I don't really even use my lineman's unless I come across a branch I cannot get past with using two ropes. You could always keep two attached, but one tucked away in a molle bag