I don't know. I'm just bored with it. Since i doubt there is a 'cure', maybe a little back story within TWD about how it happened or when Rick was in a coma, i don't know. Otherwise the story line needs to move on a bit. I haven't read anything outside this, and only watched the series, so i have no idea what else is out there, or what was written etc... The show cannot go on forever, so they need to do something otherwise i feel it will just end abruptly when ratings drop and AMC pulls the plug..
i agree with most of what you're saying. introducing a new group here or there, big battle, people die, then move on will only take the show so far. personally i like the idea of moving toward a cure, regardless of whether the comics went that direction. i think i will lose interest if life is just about finding supplies, avoiding zombies, and trying not to get killed by other groups.
but to the bolded part, i guess you have to define "abruptly." i think the show has a loyal enough following that amc will green light a final season to wrap-up the biggest loose ends that may exist, even if it is economically unwise. kinda like lost or the x-files.