"I also think the relationship I have with my audience is a lot more complex than what Hitchcock seemed to want his to be - although I think he had more going on under the surface as well"

David Cronenberg is suggesting that his relationship with his audience is more complicated than what Alfred Hitchcock wanted his to be. He believes that Hitchcock had more going on under the surface area, but he is uncertain what it was. This might imply that Hitchcock was trying to produce a more intricate relationship with his audience than what showed up on the surface. It could also mean that Hitchcock was attempting to communicate a deeper message to his audience than what was immediately evident. Cronenberg is recommending that he is attempting to develop a more complex relationship with his audience than Hitchcock did, which he is attempting to convey a deeper message to them. He is also suggesting that Hitchcock had more going on under the surface than what was visible, which he was trying to convey a much deeper message to his audience.