I think the thing to realize is that this isn't a new game being released. A lot of people will be starting 2.0 with several 50's. It's not like a conventional launch where everyone has to level to 50 before experiencing endgame content. Most people will be able to jump right into it. Thus, if there isn't a lot of challenging content people will grow bored rather quickly. I agree with the SWTOR statement. I think they should have a plethora of content to explore at launch and then drizzle in new content as they go to keep the game exciting.