I'm still a little bitter from grinding the first Gheleon's a couple months ago. I got to rank 5 and spent around 25k glimmer on weapons and armor, then they released the dlc and it was instantly obsolete before I even leveled it up. Fool me once...
I feel you. Makes perfect sense. It still felt like a slap in the face after the time and resources needed to acquire them. The timing on that was just terrible. I think they should allow Iron Banner gear to be upgraded.