There is nothing wrong with the OT. People can take exception with the Ewoks, if they want, but I don't have a problem with them. Anyone talking about the need for faster or more choreographed lightsaber battles, get out of here with that please. Obi-Wan was an old man in Star Wars. Vader could have killed Luke anytime he wanted in Empire. And neither Luke nor Vader wanted to hurt the other in Jedi. There was dramatic tension with complex motivations in all of those duals.

In the prequels, there was no subtext to the fights. Just swing sticks at each other until the other person dies. Boring.