Quoted from TaylorVA:CGC acknowledged an issue with some playfields and were going to try to put down more ink through the screening process. I can't speak for what they are doing now but that is what I was told they were planning on doing to try to resolve the issue.
This is exactly what was reported by Rick on April 6th. Apparently that did not mean that previous playfields with the light insert ink were to be scrapped or swapped out, seeing as how my machine manufactured on 04/28/2016 has light ink.