I use parallel paths very seldom but I did try the Phase Doctor and it works really well.
Some people may expect a straight 0° - 360° phase shift parameter, but it’s not set up like that. Phase Doctor lets you choose if you want to flip one side or the other by 180°, then gives you the option to include additional shift. That’s my best understanding of it, anyway.
Curious to hear other people’s thoughts, but I’m of the opinion that this is resolved.