Any story that ran as the main Judge Dredd strip banner in either Prog or Meg, and isn't a copyright nightmare, should have been included.
Stuff like The Taxidermist, Kenny Who?, Banzai Batallion are no different to Anderson, Chopper or Janus stories, in that they started in the main strip but became clear spinoffs, and deserve their own collections. I'm sure that TMO now regrets the decision not to include America, which despite decent arguments to the contrary is in every respect a Judge Dredd strip, and quite possibly THE Judge Dredd strip.
However, this ship sailed long ago, and the best we could hope for would be its inclusion in a hardback revisit of Vol 15(?) some time in the distant future. Would you buy it?
Fading of the Light is the more pressing question. I'd vote for its inclusion, despite my (quick mental calculation) 3 previous versions.