I had the option to change my MS rolls, I did not do that. I simply rolled for the trophy, knowing I may win or lose, and was going to use it for OS gear. I didn't roll for a static item like a shield or a trinket. I won one of the trophies and they denied me because of my gear currently equipped. It might sound okay on paper but, practically speaking, its an infraction on the loot rules in the raid just to deny me a piece of offspec gear.
They gained a trophy but lost an ally. I think that about sums it up. I also stated I was looking for tank gear in Raid Chat but never wanted to roll need on static items like a shield, only greed. The trophy, at least in my opinion, is a non-greed item. You need it because it can fit all roles and classes as far as gear goes.