That's not true though. I mean the prequels are relatively old; there has been a lot of Star Wars material that's come out since Revenge of the Sith that has been excellent, such as in comics and novels. There are people out there working on Star Wars that care about and understand what's good about Star Wars.
I think that at this point, the only real problem is the two decades worth of Expanded Universe material. The 50 or so years after Return of the Jedi is pretty thoroughly documented in novels and comics, and Star Wars Legacy (a long running comic book series) covered a time period even further down the line (about 130 years after the Battle of Yavin). Even if they pick a sweet spot like 80 years after the original trilogy, they still have to explain a lot of things like the Vong War and all that messy stuff.
There may be a significant fork in continuity with this new trilogy, which, honestly, would be really refreshing. The books did a lot of interesting things, but there were a lot of developments that I just wasn't a fan of; plus there's just so much that's happened that sometimes it's hard to keep everything straight. A clean-post-RotJ-slate might be just what the EU needs.