Yes it will be very interesting to see how the next expansion instances will turnout, but you have to realize mgt was releashed just now and most ppl are well equipped at their 70s at the momment, in other words they needed to release a challenging instance. But I kinda doubt they will design they game just to make it harder for boxer in specifc, however ofc I think there will be instances in the next expansion that are almost impossible for boxers to takle.

Also, there might be class changes that will count into this aswell, it seems a group of 5 shammies are in generally doing better then a pve setup group, 1 tank, healer, 3 dps which I currently have, atleast this is the feeling im getting after reading most of the posts here.