Actually I find that (I'm not pointing to anyone in particular) that people that hate Titanic tend to say that they hate everything about it. Or people that like it just like it without knowing that it's flawed. I think Plinkett's goal was showing how there is justification to actually being of two minds about the subject.
I think he's lost nothing in his editing skills, particular side by side comparison bits. He could have compared Titanic to other important films more, kind of how he did the whole Episode 3/ Citizen Kane thing.