I might be the only one with a thought like this, but I get really annoying if I see content of the game in lower quality than other content, when both are actually pretty much uses. A great example could be the design of Power Word: Shield. Blizzard has kept this design for WoW's entire duration, while many other spells received updates in terms of design and quality. With every patch spells began looking better and greater. Fire looked like fire, frost like frost etc. etc. I mean those spells are anyway flying in a speed, so we barely noticed the changes (some didn't), but Priests are watching their shields on their targets.
I mean come on Blizzard! We all know you can do it much better (Sacred Shield or Hand of Protection). For me as a player it makes me feel like Blizzard feels less cared about a class, and it therefor removes the quality of the class. I don't necessarily want the design to be changed, but at least become improved and look more like everything else begins to look like in the game.
Is this how you feel aswell, or does design mean nothing to you?