Late to the party on my S3 rewatch, but I just watched And the Children Shall Lead. For being one of the most hated episodes, I THOROUGHLY enjoyed it. It didn't really come across campy, had a definite creepy factor, and I really wanted to know more about the history of the system, the "evil", how it all worked, etc. I also had a bit of TFF feeling, with people facing their fears, and the ship being taken over by a cult, and realized that the two most hated episodes, this and the space hippies, were combined (probably accidentally) to create the most "hated" of the movies, which I also have always loved and defended, so I guess its no surprise that I enjoyed this one. S3 hasn't been disappointing at all so far..... it is very hard for me to find "bad" TOS. It also very much seemed like the food dispensers were acting very much like card-activated replicators lol. It was very forward thinking when they pulled out the audio recording of the children to summon the "Angel"... It was like Supernatural meets Star Trek, and I loved every minute of it.
(Its been a LONG time since I revisited some of these episodes, to be honest.)