People are refering to the sewing scene as being unnecessarily long. I thought the scene was great. Clem is a lot more capable then she was in Season 1, and scenes like this show that. The scene is suppose to make you feel very uncomfortable and feel Clem's pain. Sewing your arm without any sort of painkiller is no easy task, it's long a long and grueling process. If they would have just used a jump cut, then it just wouldn't have been as impactful.
Also note that this is The Walking Dead, and they will do whatever they can to gross you out when possible.