Grandfathered ratings are very low, FOX expected New Girl and Brooklyn Nine Nine to help it and The Grinder, but it has done nothing for either show, they will both likely be cancelled by the end of the season, as for the muppets, I'm not saying their ratings are good, but Agent Carter and Galavant tanked in the ratings, so that's making the muppets look better. I'm surprisingly not worried for the muppets being cancelled, if it just stays in the ratings it had in the winter, hopefully it'll go a bit higher than Disney synergy will get it renewed, keep in mind it's ratings are barely below Agents of Shield and Once Upon a Time, both Disney shows, and the latter might sink even lower in the spring.