Janice was due to go on landing party duty again in the Galileo 7 and City on the Edge of Forever. In fact she's back in the graphic novel version of the original script of CotEoF out in June. I'm quite interested to see what contribution she would have made - hopefully a bit more than Uhura.
I've never understood why they sent a communications officer down to help capture a drug-crazed fugitive surgeon. Was she skilled in negotiating with the insane or something?