The old EU was buckling under its own weight and there had been talks about rebooting it even before the sale, possibly before Kathleen Kennedy was brought in. The prequels themselves were causing massive retcons and problems with all the post RotJ books, and then when TCW started, since it was created by George, with many story concept pitched by him, it gleefully trampled over the previous Clone Wars related media (TV shorts, comics, books, games). It was unwieldy even without going into quality issues.
Sure I miss parts of it. (X-Wing books, HOOJIBS). But especially without any new movies and TCW heading towards cancellation, the audience for EU books and comics was just going to get smaller and smaller.
Look, I hated the last 30 minutes of Avatar: The Last Airbender so much, I haven't read any of the comics and I didn't watch Korra. But I also don't go around screaming that they aren't canon! I just don't consume them .