I'm not a fan of the what Walt would have wanted. He changed direction on a dime. He opened Disneyland in 55 and 4 years later completely reshaped a large portion of it. By the time we hit 1966 he had released plans to create an entire city on the opposite side of the country. Like a lot of entrepreneurs Walt kept bouncing moving in different directions.
I am a proponent of preserving as much as Disneyland's history as possible and do not feel Star Wars land fits within the concepts of Disneyland. That being said I can be confident that the person who would have altered Disneyland's DNA more than anyone if he was around is Walt Disney. We would be pleading with him to not ruin what he created.