WTF Sleveless Cenarion?

Since I recently  switched from playing retail wow US to EU I’ve had to re-get a lot of my old transmog items, including my  Tier 1, the Cenarion set.  But look what they’ve done?!?!

Above left is me in  vanilla.  Maybe it’s a little dark but you can clearly see that the Cenarion chest has brown textured sleeves.  On the right is the set as shown in retail WoW.  Totally sleeveless!  Why?  I find it hard to believe that there was a pressing need to change the look of T1…