I can assure you straight away it aint happening as there is no "roll". Stuff drops separately for each player in GW2 fashion

The mechanic would be nice as long as its kept subtle and under control. The slight differences on particular item are cool. Completely random loot is annoying. If the loot is completely random like in ARPGs, players will loose all initiative to participate in particular events. Here is a short example

Jim: "Yo Bob, wanna head to a dungeon?"

Bob: "Sure Jim, which you have in mind?"

Jim: "Uhm, it doesnt matter right? Since random crap drops everywhere. Lets do FatBastard7 boss, he is easy"

Bob: "Yea, you right Jim, everyone farms only FatBastard7, its the best way to farm gear, very time efficient"

My only concern is how much gear will influence PvP performance. I don't care how the game calculates what stats are on the weapons. I care how the game calculates what kind of damage I give or take when fighting other players. I don't want another WOW where gear is the deciding factor in who wins a fight.