I have a theory that, somewhere in the planning of The Force Awakens, when the decision to jettison the bulk of Expanded Universe canon and not follow an established story arc (a decision I largely like, I might add) had been made, there was also a conscious decision to go through EU looking for reference points, objects, and names that have their own mythological status. Anything with too much cachet was excised from the movie. It is clear watching the film, which had to be resonant with the original trilogy, that they frequently gave a response the conversation around Star Wars as much as trying to forge their own path ahead. Sometimes, though, the choices seemed to zig in odd directions because a more reasonable solution had already been claimed by EU. Other times they just made choices and moved on without comment. This is something I noticed at several points in the film, including their choice for Kylo Ren’s given name, the designation “black squadron” and, particularly, Han’s pants.
In the original trilogy Han’s gear includes a blue pair of pants with a gold braided stripe down the side of each leg. This may be chalked up to nothing more than a sort of goofy ’70s costume design choice, but those stripes came to possess their own mythology that is bound up with Han’s past, his relationship with Chewbacca, and how, despite his nonchalance, interest in money, and eye toward self-preservation, he is actually a nice man at heart. Those stripes came to represent that Han did not miraculously develop a conscience across the three movies because he became friends with Luke and had the hots for Leia, but rather was a hero already–one who was only fighting who he was in running from the rebellion. Likewise, the stripes indicate that it was not mere nepotism or happenstance that Han became a general in the Rebellion for doing basically nothing. In this mythology, the stripes on Han’s pants explain who he is as a person and inform his character in the trilogy.
In the Expanded Universe, Han’s pants display Corelleian Blood Stripes, a military honor awarded for conspicuous bravery, and were the only military decoration he was allowed to retain after being drummed out of the Imperial navy for saving Chewbacca from a press labor-gang. In The Force Awakens, Han just has black pants, but when Leia comments about his wardrobe she only does so on his jacket. There are, of course, character reasons why Han would have discarded military decorations after going back to smuggling, but, even though the the movies err on the side of giving away nothing about the characters beyond what is shown on screen, the casual discard seems to be a conscious decision to say that the originals were no more important than a quirk of the original costume design.
I liked the decision to largely avoid direct portrayal of EU storylines, but the insistence in avoiding overlap is a shame. Some of the EU material is quite lackluster, but there is also a lot of it and there were some good ideas tossed about.