I didn't have any problems understanding 3P0 but i agree it is weird hearing a different voice. But that's just down to the fact of having already heard the original one.
I did spot something though. There is a something weird going on, like a stray frame, on the video underneath the wipe at the end. Just look at the first few frames as the wipe starts and you'll see what i mean. Also, i forgot if you're working at 23.976fps or 25fps