The problem with Family Guy, and I'm a huge fan, is the blatant politicizing of the episodes for the last 10 or 12 episodes (started mid-last season).
I can deal with Seth McFarlane being a raving lunatic liberal, he played it funny, and light-hearted until about middle of last season. Once he ramped up the "message" of the show it got annoying.
back when season 3 started he made a point the show would never have a "message", or any kind of moral closure at the end of the episode. Now it's like he intentionally goes out of the way to make some kind of liberal point in each episode it is annoying.
I can't imagine what the Cleveland show will try and do, but I don't look forward to it, I don't even watch American Dad as that started as Seth's subliminal message outlet for making fun of conservatives real quick... I haven't watched in I don't know how long.