I'm inclined to agree that many of the characters seemed a bit off-centered in their portrayals (in the past anyway. I guess Thrall was pretty well kept the same during his brief appearances.) Gonna have to disagree on Cenarius though. In-game we only ever actually met him through the eyes of Grom, who was on the receiving end of the demigod's wrath. Sure, from that standpoint Cenarius was all anger and righeous fury. However, I could easily imagine him acting differently toward his allies and pupils than he would toward what he perceived to be the beginnings of a demonic invasion.

The rest though...Azshara reduced to a dimwitted, preening airhead concerned only with maintaining a steady presence of fawning admirers and looking her best when the Dark Titan arrived? Sure, it's never exactly been indicated that the Highborne acquired their power through a strong work ethic and dedication to knowledge itself during their studies of the Well (quite the opposite actually, since they seemed more interested in quantity than in quality of arcane magic), but it just seemed ridiculous that the most powerful of them all would be the stupidest and most ignorant one as well. All around her various Highborne started to realize what was really going on, yet she remained blissfully oblivious to everything, even going so far as to be convinced that it was Sargeras who would be subordinate to her when he finally came, since her simplistically portrayed mindset couldn't even conceive of a being greater than herself. In short, the Azshara of the WotA trilogy was essentially a fancily dressed moron , almost like she was nothing but a figurehead manipulated by the likes of Xavius even before the Legion contacted their world. The same disappointment applies to Vashj. As one of the empress's favored Highborne attendants, in keeping with Azshara's own shallow portrayal she was made into a sniveling, attention-mongering sycophant who, despite being a Highborne with supposed access to impressive magical power, resorts to trying to stab Tyrande with a knife to maintain her exalted position. With all that power, you'd think once Elune's protective light was gone a Highborne could just blast Tyrande apart.