One thing that seems inconsistent in the original triology is the way things sometimes happen on huge scale, like giant star destroyers and a battle station that can destroy a whole planet and intimidate everyone in this huge galactic empire - but then the imperial forces are so intent on finding the location of rebel base and destroying it when the rebel base is smaller than a US air force base and the rebel fleet is smaller than the US air force. If there really was a rebellion that threatened this galatic empire, there would need to be hundreds of rebel bases hidden throughout the galaxy and they wouldn't be able to crush the rebellion just by destroying one.

Also, the idea that they could blow up the Death Star with just one shot from a single small fighter really strains credibility.

Also, when the main characters leave the death star Lei seems to have no problem leading the Imperial forces to the rebel base when she knows that the Millenium Falcon is being tracked. You'd think she would tell Han Solo to take the ship somewhere else to trick the Grand Moff Tarkin and Darth Vader.