I found this article on Christopher Priest's web site in which he gave his opinion on Diana. One part I disagree with is the claim that her iconic status prevents writers from doing anything unique with her. Except this could not be farther from the truth. The fear of something new has never been a problem for WW writers. Almost everybody who has handled her has given her a new personality, new powers, new setting new supporting cast. If anything it's the exact opposite problem; writers refuse to work with what was previously established. Sure there are fans who express displeasure but let's not pretend this is unique to Diana (see Green Lantern fans, X-Men fans, Flash fans).
Now whether or not these changes have been well received is something else entirely but the truth of the matter is that Diana is one of those characters where writers have no problem doing whatever the hell they please when they get assigned to write her.
Here's the link to the site: http://digitalpriest.com/legacy/comics/ww.html