I have this guess of a theory, and its nothing more than that.
My Only Escape might have been more important to Comsie, and I'm really glad he was able to bring that to a conclusion. New Kid was his first story and first characters, and maybe he wanted to leave Randy and Ryan as an ongoing thing. My thought is that New Kid as a story is basically finished and the climax was Randy coming out to his Mom in episodes 67-68. Time has started moving really slowly in NK; Monkey Blowtorch Day (NK #47) was written 14 years ago, but it's only been a couple of weeks over spring break in NK time.
Comsie really loved the frisson of desire and the tension of what-will-happen-if-they-know, that's kind of all sorted out now in New Kid. Randy and Ryan have Tyler and Ariel, and don't seem to depend much on people at school outside that. Coming out isn't all that scary any more. The only thing left seems to be "what if Hailey throws a fit?" and while chapters have been worked up out of less than that, I don't feel that's really what we're all waiting for.
So what's left? The boys eat lunch in the cafeteria again? Hailey acts up? Sean something something ? Ariel has some unfinished business alright, and I've poked at @MrM over whether he feels he could work that out, but Ryan and Randy? They seem to have landed on solid ground. We might be done here