I think you are vastly overestimating the size of 'EU Fans' as a proportion of 'Star Wars fans'.
I doubt Disney is worried about losing money if they say that Han's favorite color is orange when in Comic #84927 it clearly states his favorite color is blue. The vast majority of 'Star Wars fans' are most likely solely fans of the movies, who would have no idea what a 'Thrawn' is anyway.
And let's face it, people who are big enough fans of Star Wars to get that deeply into the EU are not going to boycott the movies just because it didn't take into account their favorite book/comic/character.
No I ain't overestimating anything, I know there are more just movie fans then EU fans. However removing a large chunk of the EU, just to fit in a movies that would only cover what? A few months or years at the most? Compared to the EU, which has been worked on for quite some time just seems silly. Yes its perfectly logical, to just throw away 40+ years of work down the drain.