Whether or not they just do a reboot I think will also depend on Episode VII. If they rip post-ROTJ continuity a new one, then I could see them just rebooting the EU - or at least huge sections of the timeline - and concentrating new EU in "safe" areas of the timeline like the PT, OT, and filling in the gaps left behind by the ST (like between ROTJ and Ep. 7, between 7 and 8, etc. I think TCW is relatively safe because I don't think there will be any higher levels of canon to contradict it in the near future. However, C-canon can retroactively alter details of TCW and radically change how it's viewed. If they REALLY wanted to, I'm sure they could account for Adi surviving, Even surviving, and Barriss' redemption.