Even I stop short at defending scripts written by Orci and Kurtzman.
The truth is, though, they're not completely worthless. If you get past the inconsistencies and the fridge logic, there's still interesting stories being told with interesting characters. Major props to Abrams, the cast, and the rest of the crew for bringing that out and making people forget about the inadequacies of the scripts. (Good thing there are new screenwriters for 3!)
The alternate timeline thing was a clever way to bridge the two universes and make everyone happy, but it does create some serious headaches if you think about it too much. I find it's easy, though, to put continuity issues aside and view these films on their own, as a reboot.