Many drunks I've known go either belligerent or maudlin when drinking, but not both and not at the same time. That was one hell of a performance by Leah. If it was for real, she needs help. If she was putting it on for the cameras she is simply an asshole. At 37, while around two decades younger than the rest of the cast, she is far too old to be behaving the way she did in this episode.
Luann and Sonja are the type of people I would quickly cut out of my life. Both of them instigated Ramona about not welcoming Leah's sister and then when Ramona rescinded the coerced invitation they act like they were never against the idea themselves. Not for anything, to claim that Ramona has put on a drunken spectacle equaling anything that Sonja, and Dorinda have put on in front of the cameras at any time during the run of this series is ridiculous. Luann, other than falling, hasn't been too raucous on the show. She saved that for hiatus and performed it for the police instead. Ramona may have displayed some bad behaviors but she hasn't been out of control drunk and made a spectacle of herself in public as far as I can remember.