I don't see this necessarily being a bad thing. For those of us who like the idea of parallel universes, we can just consider the Post-ROTJ EU to be just that. It can live in harmony alongside what the sequels bring, similar to how the Star Trek reboot have done for TOS.
In terms of stories being ignored, they've already gone through this I believe with the Marvel comics. After the resurgence of Star Wars in media began in the 90s, I believe there were no references to Marvel material up until the Legacy of the Force anthology began. That essentially to me was ignoring what had come before, so it isn't necessarily new ground we're treading here.
At the same time it also makes sense and I'm wondering if they will do the same for the EU between ANH & ROTJ. I've always thought the EU between ANH & ESB was very messy as there's far too many stories and events taking place for the core heroes than could occur in that 3 year period. Between the Marvel comics series, the newspaper strips, the various Dark Horse lines, and novels, a lot seemed to take place in those 3 years and none of it really lined up together. So perhaps we'll get a clean slate there as well or since Disney owns Marvel, the 77-86 comic series will be considered the official story.