DA here. I've read my fair share of SW EU and I honestly don't mind people only going off of TFA-specific canon. I mean, the SW EU is intimidating as fuck to get into, even with the vast majority of it being deemed non-canon, so I'm cool with people just sticking to the movie and not wanting to mess with anything beyond that. Same with the MCU - I read comics but I'm not expecting comic-compliance when I go into movieverse fic. That said, the details provided by knowing the EU can help with world building (like knowing the names of tech or alien species) but it doesn't make-or-break a fic for me if the author doesn't know or even contradicts EU.