The strange thing I see between original movies and the prequel is how the technology devolved a lot if you follow chronology of the movie, we know that it was just because better stuff were available for the prequels. But we can pretend it is a semi-apocalyptic time in the original trilogy even more for the rebels that had to scrape by to get stuff.

What doesn't make sense yet for the new trilogy is how after peace was made again, how they lost control of everything so fast (and they will probably make another trilogy to tell how they gone from 6 to 7). 

The funny thing is this is actually a trope of High Fantasy. Usually in high fantasy, civilizations, technologies, weapons and anything else from some ancient era are vastly superior to that found in the current age. It's interesting that you could actually, since Star Wars also deals with 'magic' and a clear black/white view of 'good' versus 'evil', classify Star Wars as a fantasy film, that just happens to take place in space.

I agree with you, but the problem is that they haven't made the prequels happen aeons ago, but just a 20 year gap the universe as a whole imploded technologically =p (so it would be closer to post-apocalypse scenario than high fantasy in this case, even if there were no apocalypse, although we can imply that the reign of the Sith were so tyrannical that all technological studies were forbidden or lost relevance and what they had withered when they killed specialists).