I am struggling to get the glass shader to look realistic in this scene. There is a lot going on, I also want the blue mix shader to be a glowing neon, and it is appearing as a solid
make sure you have ALOT of bounces for transparency, glossy, and min/max.
to make the blue neon, you could add a bit of emit and use the compositor to add glare.
The scene you have setup will, inevitably, have black patches without a huge amount of transparent samples.