well, for what it's worth, here would be my take on it:
The Jedi are arrogant and stoic to a fault. The whole idea of having no connections to people, the emotional detachment, and the Jedi playing the role of the 'old world' religious leaders all points to them as being severly flawed. What makes Luke different from the Jedi that have gone before him is that he places more value on the lives of his friends and family than he does on the Jedi code of behavior and training. Anakin does the same thing, but obviously loses the battle to stay good (and we don't know how yet.) Luke wins that battle (and ultimately, Vader does too I guess) and Luke shows that you have to have a balance between these high-minded ideals that the Jedi stand for and a more basic connection to the people around you.
It's not enough to just be connected to the whole universe through the force-- it's a case of seeing the whole and not the parts. The Jedi to me are painted in a very negative light. Sure, they are great warriors and they are revered, learned people, but they are unable to see what's going on with Palpatine because they are too stuck in their old ways. They believe that the Jedi order and the rules surrounding it should always conquer all, but in truth, they are lacking what most humans would consider very basic human qualities.
If you look at Star Wars as a mythic story arc, it's kind of a classic tale of the old, established powers-that-be crumbling under their own failure to grow and change. Anakin and Luke represent varied attempts at changing with time and bringing more humanity and empathy and love to the Jedi order.
If you follow out the logic of Yoda's warnings to Luke, then Luke should not confront Vader and the emperor, should not help his friends, and should stay with Yoda to complete his training. Well, in the end, obviously Luke made the right choice, which meant that Yoda was wrong. Of course, you could always say Yoda was telling Luke what he needed to hear, but the films don't support that. After Luke leaves, Yoda is concerned that he is going to fail... so obvioulsy he wasn't using reverse pyschology.
So, that's it. There's no reason for Palpatine and Sidious to be two different people, and in fact, this is a case where everything points to them being the same person and that conclusion makes the most sense. In the larger scale of the story, the idea that Palpatine is just a clone doesn't help. What we need to see is the fall of the Jedi not at the hands of one sith, but under the weight of their own lack of forsight. And that's what I think we'll see.