The insert lenses are fine. The general illumination, not so much. The following photos were taken in a very dimly lit room (so that they would show the playfield illumination from the game itself without much help from the room lights). This took some adjusting with my camera settings because modern cameras are really good at compensating for different light situations and making things look better than they really do. I feel that these are VERY close to what my game looks like in a dim room to the naked eye.
Here is a photo of the game in test mode with all of the leds (inserts and gi) set to white:
See how all of the inserts are nice and bright? Good, right? But look at the slingshots and the other plastics that have the gi lights under them. They are barely lit. Barely any light transmits through the plastics (I had to look under the brown one at the lower left of the playfield to see if the light was actually working). Almost no light makes it onto the playfield from the gi.
For the next photo, I toggled the test mode into gi only, again set to white.
Comparing the two, you can see that under the 2.0 system the game is really only lit by the ambient room lights and the inserts. Had I turned off the lights in my game room, you would not have been able to see the playfield art in the second photo at all.
I reached out to JJP about this. Butch looked into it and concluded that this is standard 2.0 light operation. He said that since the light tubes for the gi are not as efficient as the insert lenses at transmitting light, the gi lighting is always going to be dimmer than the inserts unless something can be done in code to allow the gi to be turned up. He said he would send a note to the code team about it.
Aside from the propensity to occasionally fail, I miss my original lighting.