Let me point out the problem with your logic. The SE's and DVD's have shown that the films, themselves, can be trumped by newer films, so I guess it's hardly worth following the OOT as well? You might as well tell Bossk to give up his avatar and username, since his character's name CAN be contradicted at ANY TIME!
All stories and films can be trumped by newer canon. That does not mean that all stories are trumped, nor that all stories will be trumped. If your fear of the EU is that Lucas may change it, then I don't know what to tell you.