I may be in the minority but I happened to really enjoy the Well of Eternity Trilogy. I think everyone is getting all caught up in the time-time travel elements, which is by far the least important component in the series. I believe that Knaak used it as a device (much like the Cavern of Time was a device for players) for the reader to experience the events that took place in Azeroth those centuries ago. The entire time I read the books I felt as if I was an invisible participant watching everything happen. Honestly, the "whole" time thing can be equivalent to a village loremaster (storyteller) telling a child about the great wars and battles of their time. That child's imagination may allow him/her travel in time as they listen to the storyteller. So even if the time travel events is "canon" I don't think Knaak would have said that the time travel component was a major theme when he wrote it. I couldn't stop reading them once we knew who our players were.
I know this is an article but I had to express that I think Knaak is an awesome writer and that I think people are unfairly critical. IMO if ya gonna be critical about it, it should be about something relevant and the whole "time travel" element just isn't.

It's funny though, after listening to Stormrage, he was able to revisit the time travel element, talk about reaping what you sow? I mean an entire chapter was about Broxigar's sister or cousin (don't remember what she was) seeking revenge on someone from her nightmares (the one that she believes killed Brox).