It does look like some clarification is needed though, as the article mentions one point.
"Interestingly, the Gateway to Khitai, which is part of a 20-to-40 area, is the only new area being added with the expansion. The vibe we got was that Funcom wants to flesh out the less potent part of the game world's content and this level spread was the weakest link -- at least until now."
This proves to be a conundrum when information like this is stated, when in fact Craig has gone on record at one point discussing new "Level 80" content.
"The steppes of the Gateway to Khitai provide level 20-40 adventuring, and lead players up to the Great Wall. But not beyond it.
To get beyond the Wall and into Khitai proper, you'll need a high-level character"(Source)
.Hopefully this will be rectified
In the mean time, there is still some good information there, so please give it a read.