Yep. It really would have made more sense for them to keep the two sisters together. When you look at it from a production standpoint though you can see why they chose the matches they did. Both Daryl and Beth were non comic characters and at that point they were starting to follow the structure of the comic more closely than ever. Rick, Carl, and Michonne were together for the prison aftermath in the comic and Maggie and Glenn were together as well. If Gimple had been the showrunner at the time of season 2 they probably would have all met back up at the farm just like they did in the comic but since they blew up the farm in the show they couldn't do that.