Look, I don't care if the bloating is in the script or in the screen presentation that results from it. I don't know where the plot lines were drawn, added, or criss-crossed -- early during screenwriting or later during production. It doesn't really matter to me as the viewer, but if it makes you feel better that I criticize the movie plotline rather than the script itself then so be it.
I'm not attempting to challenge the complexity of the characters in the movie (though, to be honest, I really wouldn't be looking to a movie like POTC2 for serious character development), just the assorted plotlines and the general chaos of their presentation. Part of the problem, I'm sure, is that I was sitting far too close to the screen at the time, but I had too much trouble following what was going on in the flick because there were just too many different plot lines all intermixed. I had the same sensation that I did when I went to see Matrix2. The first one was linear, simple, and effective. The second got so caught up in trying to create a cool, complex world and story that it became more about concentration and comprehension and less on sitting back and experiencing.
One thing I will give Lucas credit for is Empire Strikes Back; at least he kept it relatively simple with a central focus on the characters. I didn't really find myself caring for anybody in POTC2, I was too busy figuring out what it was they were supposed to be doing, and why.