So i'm sure alot of people have come across a couple of issues with lfr loot.
1.Gear just never seems to drop for you at all.
2.The gear that drops you already have or you didn't need.
3.No loot from boss or coin.
The problem is we have no control over the rolls. It rolls for you even if you don't need gear of a particular boss.
My suggestion to Blizz is to add an interface similar to the coin system. Where a window comes up after the boss is dead and says roll/pass. If there is nothing you need hit pass it gives you gold. Thus, (please correct me if im wrong) giving everyone else a better chance at obtaining gear. If you roll it gives you a chance at boss loot yes even if you already have that item. However if you use a coin then it looks at your gear after rolling if it sees the same item then it gives you something else thus making the coins have more value. (with exception of things like warriors, rogues and their weapons)
I'm sure there are a million and half reasons that Blizz haven't done something like this and i'm sure someone is going to poke holes all through this but this is just my suggestion.
Thanks for your time,