I wish they would switch things up a little.
Personally I don't care what people spend their money on. Its THEIR money lol.
My thing is that I wish they would take that creativity they found crumpled up in a ball behind the couch in the Blizzard Lounge Room™ and use it when designing the tier sets. Because T16 Looks like sh*t all around. It's like no thought was put into any of it.
Then they come out with these magnificent xmog helms to sell for $15 a pop that would look amazing if they could be part of a tier set. Try to imagine a DK w/ the ice crown helm with a frost oriented set... the skeletal visage disappearing and reappearing. Now that would be awesome! Right?
Instead we get this http://www.youtube.com/watch?v=6kQSM-ZzucI which in my opinion plays too much on the t14 armor. That's just my OPINION though. Keyword: Opinion. Google it.
15$ a month isn't just a monetary investment. It's also a time investment as well.
So TL;DR I wish we had tier armor the same quality as the xmog items on the blizzard store for the time investment we put in playing/raiding.