Eloc - whether one or the other game wiki, Eric's point is that the content of this wiki is directed to a different audience than those familiar with the game and mechanics found at Guild Wars Wiki 'or' GuildWiki.
I think that the 'corrupt bodyguard' text currently in the article is fairly clear and avoids using either 'assassin' or 'warrior'. Both terms having multiple meanings in the game and irl. 
 wrt the plot descriptions it could be that a 'See also' (or similar) at the top of the campaign section is sufficient and the campaign mechanic description would be left in the section.  I don't have much trouble with the plot descriptions, because the different plot is a fairly big noticeable difference between campaigns.  But taking them out to make a tighter main article is fine because the plot text seems to only pad out what is essentially a list of links to the different campaigns.