I just watched it for the first time today!
*jumps up and down with glee*
I agree entirely,
Boromir. The scene with Saruman on Orthanc really cleared up a lot of loose ends to the plot. It should have been in TTT. At the least PJ could have put it into the first release of ROTK. Sadly, it was not, but I thought it was very good scene.
As for Saruman's death. It really wasn't that much different from the book. Only in a different place. Grima jumps on Saruman, and stabs him with a dagger. Grima gets shot with an arrow and also dies. That's not too much different, and since the Scouring of the Shire was not in the movies at all, they couldn't have done it there anyway.
But one thing that I really didn't like was the Witch-king breaking Gandalf's staff. I was just like
.