Why what happened?
Personally I like the "Underworlds" idea. I have said several times here. If you want to make not just a good StarWars show, but a good show period then you scrap main characters from the films, you go light on the jedi and sith, what you do show is the common denizens of the galaxy, the criminals, bounty hunters, soldiers, imperial senators, etc. All the meanwhile you have the newborn Empire increasing its hold on the galaxy in the backdrop. You let slip mentionings of major events we can pick up on and mentionings of Emperor Palpatine, and his black suited terror, but don't really show them.
Again I will point to HBOs Rome, that is the model to base this show off of. That show followed 2 soldiers around, for the most part, meanwhile MAJOR events of history occured all around them, it was done perfectly.