Even if I don’t like the Prelogy (or PT), let’s be fair about the difficulty to make something logical out of the background stories contained in the OT:

Anakin forgot he had a son and has no clue he even had twins (really ?)
Leia’s mother has never tried to pay her son Luke a visit (?)
the Empire is ruled by an old man with skin issues and a cartoon laugh
Owen Lars is named Lars, not Skywalker, so only Beru is a Skywalker, moreover Anakin’s sister: is she Force sensitive ?
etc.

In fact, the PT went wrong the day Gary Kurtz left REVENGE OF THE JEDI pre-production, leaving Lucas on his own to finish the 4 new sequels in only one mediocre movie (Luke’s sister being Leia is the worst damage of the project getting shrinked) and the 3 prequels into this awkward and lazy trilogy (which can be fun from a certain point of view). Every Star Wars movie released since the marvellous EMPIRE STRIKES BACK is not worthy of the first two installments of the saga. THE FORCE AWAKENS looks OT but has a PT essence. So, when a 7 (soon 9) parts saga has 5 (soon 7) bad/mediocre movies, it’s hard to bring consistency in it.

That being said, I agree with those who think that the PT should have been set a very long time before A NEW HOPE, like 1000 years before. No Anakin, no Ben, no Palpatine, no Yoda, no Jar Jar. The PT could have even been set such a long time ago that Jedi and Sith didn’t exist the way they now do, with the Force as a living and surpernatural energy not completely released yet. To clarify my view, here are 3 examples of what the PT could have been like:

DARK CRYSTAL (yep, Gary Kurtz involved, hardly a surprise)
THE LEGEND OF KORRA Season 2 (the flash back episode with the first avatar)
SAMURAI JACK (the “birth of pure evil” episodes)

Star Wars went wrong when this incredible universe got resized to family business, and sadly THE FORCE AWAKENS keeps on this stupid idea. I hope ROGUE ONE does not contain references to any Skywalker family issues so it could at least stand as a proper EPISODE III (TPM can still be a “good” prequel film - especially in a fan edit form like A CLOAK OF DECEPTION - because it does not damage too much the OT*, and it could become the “real” EPISODE II if Disney were to produce a KNIGHTS OF THE OLD REPUBLIC movie that would nicely be the “real” EPISODE I).

(nevertheless I still want to see v4 of THE APPROACHING STORM and v2 of DAWN OF THE EMPIRE !)

(* by the way, I wonder if the “ultimate machete” order way to watch the main saga could be the following:
1 - 4 - 5 - 2 - 3 - 6)

(but still the best way to watch the 6 movies is: 4 - 5 - 5 - 5 - 5 - and a digest of 6).