Watching the OT: "Wow, cool, a Jedi using a lightsaber!"
Watching the PT: "There are like a hundred weird ass looking Jedi using lightsabers on the screen at once..."
I agree in essence of what zombie is saying. My only addition would be that this contrast of the Old Jedi ways and Luke's progressive reform is less the result of a well-executed plan and more the result of going from having good screenwriting to having poor, unreviewed screenwriting.
Sorry, had to sneak that dig in there, but it's true. The Jedi in the PT were perhaps meant to be a little unsympathetic, but at the same time they were so damn dull and stupid.
Plus, I'd add that Yoda and Obi-Wan had to make exceptions for Luke's age and attachments, since he was their last hope (but there is another!).